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Private Detective (1939) Plot Summary & Timeline

Private Detective (1939) movie poster

Private Detective is a 1939 mystery film directed by Noel M. Smith, running 55 minutes. This page retells the whole story in 455 words (about 2 minutes to read) and covers 12 key events in order, 8 characters, where and when it is set and 4 themes. Looking for the cast, ratings and where to stream it? See the movie page for Private Detective.

to read the plot summary
2 min
key events in the timeline
12
characters profiled
8
themes explained
4
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Private Detective (1939) movie poster
Released
Runtime
55 min
Director
Noel M. Smith
Genre
Mystery
Original language
English
No spoilers

What Is Private Detective About?

The premise of Private Detective in 241 words, with nothing given away. The full story follows below.

In a city that feels simultaneously grittier than a back‑alley precinct and brighter than a carnival midway, the ordinary rules of investigation are constantly stretched by the absurd. The streets hum with a rhythm that invites both danger and delight, and every shadow seems ready to turn into a punchline. Within this restless backdrop, a mystery looms that promises to pull the city’s most unlikely duo into a whirlwind of clues, chaos, and unlikely camaraderie.

Myrna Winslow is the epitome of irreverent charm—a private detective whose razor‑sharp instincts are matched only by her penchant for slap‑stick mischief. She approaches each case with a swagger that borders on theatrical, tossing quips around like confetti while never losing sight of a hidden detail. Opposite her stands Jim Rickey, a by‑the‑book police detective whose disciplined demeanor and meticulous methods provide the perfect foil to Myrna’s unorthodox flair. Their partnership crackles with tension and humor, each trying to teach the other a lesson while secretly learning the value of the other’s perspective.

When word spreads of the puzzling murder of a reclusive millionaire, the pair find themselves thrust into a riotous mystery adventure. The investigation becomes a playground where clever sleuthing collides with nonstop physical comedy, forcing Myrna’s spontaneity and Jim’s precision to dance together in an ever‑shifting choreography. Their unlikely alliance promises not only to untangle the enigma at hand but also to keep the audience laughing long after the clues are laid out.

Full plot

What Happens in Private Detective?

The complete story of Private Detective, from the first scene to the last, in 455 words (about 2 minutes). Spoilers throughout. Names in the text link to 8 cast member pages.

Spoilers ahead

John Eldredge as Millard Lannon sues his ex-wife Gloria Dickson Mona Lannon for custody of their son, a case that drags in the nation’s top detective agency where Jane Wyman Myrna Winslow works. Myrna sees right away that Millard’s motive goes beyond parental rights, hinting at control of a valuable child’s trust fund, and she refuses to testify against Mona. When her boss pushes, Myrna decides to quit, marries her police lieutenant fiancé, Dick Foran as Jim Rickey, and looks forward to a stable life with him, hoping the past stays behind them. Yet the case refuses to stay buried, and old loyalties quickly collide with new danger.

That night, Nat Flavin, Morgan Conway Millard’s lawyer, engineers a lethal turn when he kills Millard in his own home, masking the crime as a routine claim for protection after a supposed threat from Mona. A neighbor overhears the gunshot, and a witness spots Mona leaving the scene just as the echo fades. Myrna, now entangled in the fallout, follows the trail as Jim investigates the shocking murder, while his trusted assistant Brody Maxie Rosenbloom quietly joins the pursuit to aid in what becomes a dangerous, high-stakes inquiry.

Myrna discovers Mona hiding in a hotel and realizes the case is more twisted than she feared—Mona insists she’s innocent and urges Myrna to help her escape. Meanwhile Nat puts pressure on Donald Norton, John Ridgely to turn Mona in, and he even tries to secure himself as Mona’s defense attorney. The tension tightens as Myrna confronts Nat and pieces together the grim truth: Nat has appointed himself the legal guardian of Mona’s son to seize the boy’s trust fund, weaving a web of lies to keep Mona under his control.

Armed with new evidence, Myrna contacts Jim and reveals Nat’s guilt, drafting a report that implicates Nat in Millard’s murder and exposes the frame-up against Mona. Just as she prepares to share it over the phone and meet Jim at the office, Nat storms in, knocks Myrna unconscious, and drags her to his beach house. He is joined by his accomplice Chick Jerome, Dick Rich, as they intend to silence Myrna by removing her evidence.

Mona and Donald arrive with a retainer to defend their case, while Jim and Brody move to close in. A tense confrontation erupts in the garage, where Nat’s plan to poison Mona and Donald’s drinks is halted just in time. They locate Myrna’s report, and a desperate struggle ensues that ends with Nat and Chick subdued. In the aftermath, the truth about Millard’s death, the frame on Mona, and Nat’s ruthless bid for control come to light, and the trio—Myrna, Mona, and Donald—stand ready to clear Mona’s name and safeguard the child’s future.

Timeline

Private Detective Timeline: Every Key Event in Order

12 key events in the order they happen, from “Millard Lannon sues Mona for custody” to “Abduction, hires, and rescue”. 11 events name a place, across 8 locations.

  1. 1

    Millard Lannon sues Mona for custody

    Millard Lannon sues Mona Lannon for custody of their son in a tense, high-stakes move. The filing centers on Millard's attempt to control access to the child's trust fund and Mona's role in their fragile family dynamic. The custody fight sets the legal stakes for the looming conflict between the ex-spouses.

    Where:Millard Lannon's home

  2. 2

    Detective agency pressures Myrna to testify

    The owner of the Nation-Wide Detective Agency pressures Myrna Winslow to testify against Mona. The tactic is meant to undermine Mona's defense and tilt the case in Millard's favor. Myrna weighs the order against her sense of justice and personal loyalties.

    Where:Nation-Wide Detective Agency

  3. 3

    Myrna quits and marries Jim

    Myrna declines to testify, quitting the agency. She soon marries her police lieutenant boyfriend, Jim Rickey, signaling a personal turning point amid the family dispute. The move aligns her with law enforcement in the unfolding saga.

    Where:Myrna's home

  4. 4

    Myrna overhears a murderous scheme

    Myrna overhears a call in which Millard demands police protection because Mona has threatened his life. The exchange hints at a calculated plot led by Nat Flavin to remove Millard as an obstacle. This overheard moment foreshadows the murder that follows.

  5. 5

    Millard is murdered

    Millard Lannon is shot dead in his own home. A neighbor reports Mona leaving the house just as the gunfire is heard, making Mona a person of interest. The murder kicks off a new phase of the investigation.

    Where:Millard Lannon's home

  6. 6

    Myrna and detectives locate Mona

    Myrna accompanies Jim and Brody to investigate the crime. They locate Mona hiding in a hotel, and Myrna informs her that the police suspect her fiancé Donald Norton. Mona lies about the killing, and Myrna chooses to help Mona escape instead of turning her in.

    Where:Hotel

  7. 7

    Nat pressures Donald Norton

    Nat Flavin tries to persuade Donald Norton to turn Mona in, while offering to defend Mona as her lawyer. The maneuver reveals Nat's growing influence over the defense strategy. The tension between the conspirators deepens.

    Where:Donald's home

  8. 8

    Confrontation with Donald; he escapes

    Jim and Brody go to Donald's home and confront him, but Donald escapes the confrontation. The escape raises the stakes as the investigation widens. The case grows messier as more players become involved.

    Where:Donald's home

  9. 9

    Myrna unveils Nat's guardianship plan

    Myrna decides to help Mona and Donald and intensifies her own inquiry. She questions Nat the next morning and learns that Nat has appointed himself guardian of Mona's son. This revelation exposes Nat's motive to control the child's inheritance.

    Where:Nat Flavin's office

  10. 10

    Jim disapproves of Myrna's interference

    Jim expresses clear displeasure with Myrna's interference in the case. He warns that her involvement could jeopardize the defense. Myrna remains determined to uncover the truth regardless of his objections.

    Where:Police station

  11. 11

    Myrna uncovers Nat's guilt and reports it

    Myrna finds evidence supporting Nat Flavin's guilt in his office. She writes a report stating that Nat killed Millard and framed Mona to gain access to the boy's trust fund. The document becomes a pivotal weapon in building the case against Nat.

    Where:Nat Flavin's office

  12. 12

    Abduction, hires, and rescue

    Nat arrives at the office, knocks Myrna unconscious, and takes her to his beach house. Mona and Donald arrive to pay Nat a retainer to defend them, unaware of the danger inside. Jim and Brody burst in, rescue Myrna, and capture Nat and Chick Jerome.

    Where:Nat Flavin's beach house

Characters

Who Are the Main Characters in Private Detective?

8 characters, among them Mona Lannon (Gloria Dickson), Myrna Winslow (Jane Wyman) and Millard Lannon (John Eldredge): who each one is and the part they play in the story. Every profile links to the actor’s page.

  • ML

    Mona Lannon (Gloria Dickson)

    Played by Gloria Dickson

    Ex-wife of Millard Lannon and mother to his child, Mona becomes entangled in the custody conflict and is suspected after Millard's murder. She lies about her involvement at times, yet remains fiercely protective of her son and willing to take risks to survive. Her actions reveal a pragmatic, resourceful survival instinct amid a maze of lies and accusations.

    • 💔 Ex-wife
    • 🕵️‍♀️ Accused
    • 🤝 Protective
  • MW

    Myrna Winslow (Jane Wyman)

    Played by Jane Wyman

    Employee at the Nation-Wide Detective Agency who resigns rather than testify against Mona. She later marries Jim Rickey and becomes a crucial ally, assisting Mona and Donald as she uncovers Nat Flavin's guilt. Her integrity and courage drive the investigation forward and test her loyalty to lovers and colleagues alike.

    • 💼 Investigator
    • 🕊️ Loyal
    • 🚨 Courageous
  • ML

    Millard Lannon (John Eldredge)

    Played by John Eldredge

    A wealthy, controlling husband involved in a contentious custody battle whose murder triggers the central crime. His demand for police protection foreshadows the danger surrounding Mona and his son, and his execution of the plan indirectly spurs the investigation and subsequent pursuit of the true killer.

    • 💼 Wealthy
    • 🕵️‍♂️ Catalyst
    • 🗂️ Powerful
  • NF

    Nat Flavin (Morgan Conway)

    Played by Morgan Conway

    The antagonist who orchestrates the scheme to seize Mona's son's trust fund and appoint himself as her guardian. He murders Millard to silence opposition and attempts to frame Mona, using wit and manipulation to stay one step ahead of the detectives.

    • 🧠 Schemer
    • 💰 Greedy
    • 🥊 Dangerous
  • JR

    Jim Rickey (Dick Foran)

    Played by Dick Foran

    A police lieutenant and Mona’s fiancé who supports Myrna's investigation. He pursues the truth with determination and forms part of the team that rescues Myrna and captures Nat, balancing personal loyalty with professional duty.

    • 👮🏻‍♂️ Lawman
    • 💪 Loyal
    • 🔎 Investigator
  • DN

    Donald Norton (John Ridgely)

    Played by John Ridgely

    Mona's intended husband and a central figure in the custody dispute. He becomes a suspect in Millard's murder but collaborates with Myrna and Mona to uncover the real killer and clear his name while defending his future with Mona.

    • 👨‍⚖️ Suspect
    • 🤝 Ally
    • 🕊️ Protective
  • Maxie Rosenbloom as Brody (Maxie Rosenbloom) in Private Detective

    Brody (Maxie Rosenbloom)

    Played by Maxie Rosenbloom

    Detective Agency employee and Jim’s assistant who joins the investigation. Brody provides practical support, helps piece together clues, and stays loyal to the mission of uncovering the truth.

    • 🧭 Support
    • 🕵️‍♂️ Loyal
    • 🛠️ Practical
  • CJ

    Chick Jerome (Dick Rich)

    Played by Dick Rich

    Nat Flavin’s chauffeur and partner in crime, involved in the darker side of Nat’s schemes. He assists in the attempted poisoning of Mona and Donald, representing the dangerous reach of the conspirators.

    • 🚗 Henchman
    • 🗡️ Violent
    • 🧩 Accomplice
Setting

Where and When Is Private Detective Set?

Private Detective is set in Nation-Wide Detective Agency, Millard Lannon's home, Police station, Hotel, Nat…. Here is why the place matters to the story.

Where

Nation-Wide Detective Agency, Millard Lannon's home, Police station, Hotel, Nat Flavin's beach house, Donald Norton’s home, Mona Lannon's home, Courtroom

The story unfolds across a network of urban and private spaces: the Nation-Wide Detective Agency serves as the investigative hub, Millard Lannon's opulent home becomes a scene of tension and motive, and the police station anchors the pursuit of truth. A hotel hideout and Nat Flavin's beach house provide crucial turning points, while Donald Norton’s and Mona Lannon’s residences frame the personal stakes. A courtroom and surrounding offices host the legal drama that drives the custody battle and its dramatic resolution.

  • 🏢 Detective HQ
  • 🏛️ Courtroom
  • 🏖️ Beach house
  • 🏠 Private residence
  • 🏨 Hotel
Themes

What Are the Themes of Private Detective?

4 ideas the story keeps returning to, among them Investigation, Greed and Justice.

  1. 01

    Investigation

    The plot centers on unraveling who killed Millard Lannon and why, with Myrna and Brody playing key roles in gathering evidence. The investigation uncovers lies, guardianship schemes, and shifting loyalties as clues surface in hotel rooms, offices, and the detective agency. The characters must decide what truth is worth risking their careers and relationships for.

  2. 02

    Greed

    Nat Flavin's drive to control Mona's son's trust fund motivates much of the conflict, including his self-appointed guardianship and the attempt to manipulate the legal outcome. The pursuit of wealth corrupts motives, enabling murder and deception to mask financial gain. The theme shows how money can distort justice and personal loyalties.

  3. 03

    Justice

    The custody dispute and murder investigation frame a battle over who is rightful guardian and who should be blamed. The characters navigate legal traps, courtroom tension, and police procedures as they strive to expose the truth. The resolution hinges on who can present credible evidence and outsmart a cunning schemer.

  4. 04

    Loyalty

    Myrna's choices test loyalties between personal relationships and professional duties, especially as she aids Mona and Donald despite potential personal risk. The narrative explores whether loyalty to a friend or to justice should prevail in a web of accusations. The resolution reinforces that trust and steadfastness can alter a deadly course.

Tone & mood

What Kind of Film Is Private Detective?

Light in tone, with fast pacing and a straightforward story, going by the plot summary.

Tone
Light
Pacing
Fast
Story
Straightforward
Intensity
Medium
Ending
Happy

A brisk and witty mystery adventure that pairs slapstick humor with clever detective work, creating a lighthearted and energetic viewing experience with romantic sparks and constant forward momentum.

  • fast-paced
  • humorous
  • energetic
  • playful
  • suspenseful
  • romantic
  • crime investigation
  • female detective
  • wrongful accusation
  • ex-spouse conflict

Content notes: murder, kidnapping.

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5 films close to Private Detective in story and themes that have a full plot summary here: Private Detective 62 (1933) and Watching the Detectives (2008) lead.

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FAQ

Private Detective Plot Questions

5 quick answers about Private Detective, taken from the plot summary, character guide and setting on this page and the film’s credits.

What is Private Detective about?

In a city that feels simultaneously grittier than a back‑alley precinct and brighter than a carnival midway, the ordinary rules of investigation are constantly stretched by the absurd.

Read the full plot summary

When and where does Private Detective take place?

Private Detective is set in Nation-Wide Detective Agency, Millard Lannon's home, Police station, Hotel, Nat Flavin's… The story unfolds across a network of urban and private spaces: the Nation-Wide Detective Agency serves as the investigative hub, Millard Lannon's opulent home becomes a scene of tension and motive, and the police…

The setting explained

Who are the main characters in Private Detective?

The story follows Mona Lannon (Gloria Dickson) (played by Gloria Dickson), Myrna Winslow (Jane Wyman) (played by Jane Wyman), Millard Lannon (John Eldredge) (played by John Eldredge) and Nat Flavin (Morgan Conway) (played by Morgan Conway); the character guide covers 8 characters in all.

All the characters

What are the main themes of Private Detective?

The summary picks out 4 themes: Investigation, Greed, Justice and Loyalty.

The themes explained

Who directed Private Detective?

Private Detective (1939) was directed by Noel M. Smith and runs 55 minutes.

Noel M. Smith’s films

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