What Is Monkey Business About?
The premise of Monkey Business in 293 words, with nothing given away. The full story follows below.
In the gleaming corridors of Oxly Chemicals, the pursuit of a miracle drug is more than a corporate goal—it’s a personal obsession. Barnaby Fulton, an absent‑minded research chemist with a wistful yearning for a fountain‑of‑youth, spends his days tinkering with a secret formula that promises to turn back the clock. His world is a blend of lab coats, beakers, and boardroom whispers, where the pressure to deliver a blockbuster keeps the fluorescent lights buzzing and the ambition humming. Around him, a cast of characters adds color: the profit‑driven boss Oliver Oxly, whose eyes are fixed on the market potential, and the ever‑supportive wife Edwina Fulton, whose patience masks her own dormant desires.
A mischievous laboratory chimp named Esther introduces an unexpected twist when a careless escape leads her to tinker with a beaker and inadvertently sprinkle its contents into the office water cooler. The single sip of that tainted water becomes a catalyst, igniting a sudden surge of youthful vigor that catches Barnaby off guard. The film teases the idea that a simple drink can dissolve the weight of years, setting the stage for a light‑hearted exploration of what happens when adulthood is momentarily replaced by the reckless optimism of youth.
The tone of Monkey Business balances slapstick charm with a gentle satire of corporate culture and midlife malaise. As the rejuvenating effect ripples outward, the once‑staid environment begins to crack, hinting at a day where serious suits might swap spreadsheets for playground antics and polished routines give way to spontaneous mischief. The premise invites audiences to wonder how far the characters will let this fleeting restoration of vitality carry them, promising a comedy that revels in the chaos of rediscovering the joy of being young again—without revealing how the story ultimately resolves.
What Happens in Monkey Business?
The complete story of Monkey Business, from the first scene to the last, in 630 words (about 3 minutes). Spoilers throughout. Names in the text link to 1 cast member page.
Spoilers ahead
Dr. Barnaby Fulton, Cary Grant, is a slightly absent-minded research chemist at the Oxly chemical company who dreams of an elixir of youth that could renew aging bodies. His boss, the financially shrewd Oliver Oxly, pushes him toward a breakthrough that could be a blockbuster, and the board shares the same keen interest in turning science into profit. The laboratory atmosphere buzzes with ambition, but chaos soon arrives in the form of Esther, a clever chimpanzee, who breaks loose and, in a moment of mischief, sprinkles a beaker’s contents into the water cooler. The mixture is not just a random accident — it holds the rejuvenating power Barnaby has been chasing.
Unaware of Esther’s antics, Barnaby tests the latest experimental concoction on himself, taking a sip from the infected water and paying the price with a startling transformation: he instantly regresses to the vitality of a twenty-year-old. With new vigor, he spends the day in the town’s bustling scenes in the company of Lois Laurel, [Marilyn Monroe], who brings a bright, breezy energy to the adventure as she becomes his companion on this improbable journey. The world looks new through Barnaby’s eyes, and the pair find themselves drawn into a day of light, risky fun that feels like a rebirth rather than a reproof of age.
Back home, Edwina Fulton, [Ginger Rogers], Barnaby’s wife, discovers the serum’s remarkable effects and drinks the potion along with water from the cooler, turning into a prankish, impulsive schoolgirl with a taste for mischief and a spark of rebellion. Her transformation jolts the household, and she reaches out to Hank Entwhistle, her old flame and family lawyer, in a quick, impulsive phone call that adds another layer of comedy and tension to the plot. Meanwhile, Edwina’s mother remains clueless about the chemical influence, concluding only that her daughter is unhappy in her marriage and might be seeking a separation.
The next morning, Barnaby and Edwina rush to the laboratory to destroy the dangerous formula, hoping to end the mayhem. Ironically, they become unwitting victims of their own experiment once again, as they drink from the contaminated water cooler to make coffee. Now under the influence, both Barnaby and Edwina slip further into their respective playful, childlike personas, while Oxly and the board step up their efforts to acquire the formula while Barnaby remains under its spell.
A scene of broader mayhem unfolds as Barnaby cavorts with a group of children who pretend to be Indians, adding a touch of whimsy and innocence to the chaos. At the same time, Edwina experiences a startling sleep and awakens to find a baby beside her. Convinced that Barnaby has overdosed, she panics, only to learn that the infant is the responsibility of the Fulton housekeeper. The duo frantically search for the antidote, and Edwina—ever determined—tries to coax the baby to sleep, hoping this will reverse the effects of the elixir.
As the laboratory becomes a hub of experimentation, more scientists and Oxly himself drink from the water and regress into a second childhood, creating an escalating cycle of confusion, humor, and gentle chaos. Barnaby, slipping through the lab window, crawls inside and settles beside the baby, exhausted but at peace in the shared stillness. Edwina discovers him, recognizing the mistake but also the fragile bond that remains between them.
In the culmination, the household homecoming reframes their relationships. Barnaby, now back in control after a moment of uncertain vulnerability, has been offered a new contract by Oxly, signaling a practical prize for his scientific talent. As he prepares for an evening with Edwina, the couple’s spirits lift and their bond seems renewed. The film closes on a sly, hopeful note about youth and aging, encapsulated in Barnaby’s final reflection: > you’re old only when you forget you’re young.
Monkey Business Timeline: Every Key Event in Order
15 key events in the order they happen, from “Esther contaminates the water cooler” to “Ending: renewed contract and renewed marriage”. 15 events name a place, across 6 locations.
- 1
Esther contaminates the water cooler
Esther the chimp breaks loose in the Oxly chemical lab, rummaging through equipment and accidentally tipping a beaker of rejuvenating chemicals into the water cooler. The workers miss the incident as they focus on their experiments. The contaminated water begins to produce a youth-boosting effect whenever someone drinks it, setting the stage for the day’s chaos.
When:Morning Where:Oxly chemical laboratory
- 2
Barnaby tests the elixir on himself
Barnaby volunteers to test the latest concoction, hoping for a breakthrough. He experiences a rapid surge of energy and sociability after the serum is injected and he drinks water from the cooler. He soon behaves like a twenty-year-old and heads out on the town with Lois Laurel, oblivious to the consequences.
When:Afternoon Where:Oxly laboratory
- 3
Lois Laurel joins Barnaby's new vigor
Lois Laurel spends the day with Barnaby as his new vigor takes hold. They enjoy carefree activities and flirtatious moments, while Barnaby relishes his reclaimed youth. The episode foreshadows how the elixir affects all who touch it.
When:Afternoon Where:City streets / town
- 4
Edwina drinks the formula and becomes a prankish schoolgirl
Edwina, Barnaby's wife, drinks the serum from the cooler and instantly transforms into a prankish, impulsive schoolgirl. Her change unsettles Barnaby and unsettles their routine, as she acts with youthfully reckless confidence. The household begins to realize the formula is more than a harmless experiment.
When:Evening Where:Fulton residence
- 5
Edwina calls Hank Entwhistle
Edwina places a phone call to her old flame and family lawyer, Hank Entwhistle, as if to test the boundaries of her new persona. The call broadens the social reach of the mishap and stirs up old loyalties. The family circle starts to fracture under the strain of the elixir’s effects.
When:Evening Where:Fulton residence
- 6
Mother suspects unhappiness, contemplates divorce
Edwina’s mother, unaware of the chemical influence, misreads her daughter's mood and believes she is unhappy in her marriage. She implies a divorce to settle the situation and tries to intervene. The misunderstanding compounds the pressure building around the couple.
When:Next morning Where:Fulton residence
- 7
Morning plan to destroy the formula backfires
The next morning, Barnaby and Edwina go to the laboratory to destroy the formula. In a twist of fate, they both drink more of the contaminated water while making coffee, sealing their own exposure. Oxly and the board arrive, pressuring Barnaby for a sale while he’s clearly under the serum’s influence.
When:Morning Where:Oxly laboratory
- 8
Oxly pressures for a sale while Barnaby is under influence
Under his altered state, Barnaby becomes a focal point for pressure as Oxly and the board attempt to secure the formula. He regards the deal as normal business, unaware of the chaos behind his thoughts. The situation intensifies as the opportunity to monetize the elixir collides with its unpredictable effects.
When:Morning Where:Oxly laboratory
- 9
Barnaby entertains children as Indians
Barnaby wanders into the laboratory’s vicinity and plays with a group of children, pretending to be Indians. The moment showcases his regained youth and childlike enthusiasm, even as the adults scramble to regain control. The scene blends whimsy with the unintended consequences of the serum.
When:Afternoon Where:Laboratory grounds
- 10
Edwina wakes to a baby and confusion
Edwina wakes to find a baby sleeping beside her, prompting confusion and fear. She mistakenly assumes Barnaby has overdosed, but the infant is actually the Fulton housekeeper’s charge. The mix-up escalates as she and Oxly realize they may be chasing a false threat.
When:Next morning Where:Fulton home
Show the other 5 events of Monkey Business Hide the last 5 events
- 11
Search for antidote and attempts to soothe the baby
Edwina and Oxly search for an antidote while trying to soothe the baby, hoping to reverse the effects before more people are affected. Edwina attempts to lull the infant to sleep, believing it could reset the formula’s power. The investigation spans the home as the clock ticks.
When:Morning Where:Fulton home
- 12
More scientists drink the water and regress
Back at the laboratory, more scientists and Oxly drink the water and regress to second childhood. Chaos erupts as the staff relives their youth and forgets their responsibilities. The panic highlights how deeply the elixir has unsettled normal life.
When:Later that day Where:Oxly laboratory
- 13
Barnaby returns to the lab to sleep beside the baby
Barnaby crawls into the laboratory through a window and lies down to sleep beside the baby, embracing his childlike state. The act underscores how the elixir has softened his adult priorities. The moment signals a shift toward reconciliation rather than conquest.
When:Evening Where:Oxly laboratory
- 14
Edwina discovers the truth and faces the consequences
Edwina discovers Barnaby in his childlike repose and realizes her mistake. The couple’s embarrassment gives way to renewed understanding and affection. The moment foreshadows a hopeful ending rather than a tragedy.
When:Evening Where:Fulton home
- 15
Ending: renewed contract and renewed marriage
Back home, Barnaby accepts a renewed contract from Oxly, and his marriage with Edwina is revived. He odd ly quips that 'you're old only when you forget you're young,' crystallizing the film’s theme. The end suggests a lighthearted balance between youth and wisdom.
When:Evening Where:Fulton home
Who Are the Main Characters in Monkey Business?
5 characters, among them Barnaby Fulton (Cary Grant), Edwina Fulton (Ginger Rogers) and Lois Laurel (Marilyn Monroe): who each one is and the part they play in the story. Every profile links to the actor’s page.
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Barnaby Fulton (Cary Grant)
Played by Cary Grant
A well-meaning, absent-minded research chemist whose obsession with youth drives the plot. He shifts from a devoted husband and scientist to a carefree, impulsive man-child under the elixir's influence. His warmth and impatience anchor the story's emotional core as he navigates love, ambition, and mischief.
- 🧠 Eccentric
- 🧪 Scientist
- 😂 Comedic
-
Edwina Fulton (Ginger Rogers)
Played by Ginger Rogers
Barnaby's wife, initially poised and sensible, becomes a prankish schoolgirl under the serum's effects. Her transformation tests their relationship and reveals a playful, adventurous side beneath domestic life. She remains decisive and resilient as they seek an antidote.
- 💃 Charismatic
- 🧭 Adventurous
- 😂 Mischievous
-
Lois Laurel (Marilyn Monroe)
Played by Marilyn Monroe
Barnaby's secretary, whose presence adds glamour and flirtation to the mix. Her interactions with Barnaby and Hank fuel social comedy and romantic tension, embodying a witty, charming lead who navigates chaos with grace.
- 💃 Charismatic
- 🗂️ Secretary
- ❤️ Romantic
- OO
Oliver Oxley (Charles Coburn)
Played by Charles Coburn
The shrewd, commercially minded boss and board member who oversees the laboratory’s fortunes. He pursues the elixir for gain and power, often clashing with Barnaby over scientific autonomy. His managerial swagger provides a satirical look at corporate ambition.
- 🏢 Boss
- 💰 Ambitious
- 🧠 Pragmatic
-
Hank Entwhistle (Hugh Marlowe)
Played by Hugh Marlowe
The family lawyer and Edwina's old flame, drawn into the chaos by the serum's effects. His involvement amplifies the romantic confusion and legal tangles, blending wit with a touch of romance as the plot unfolds.
- 💼 Lawyer
- 🧑🤝🧑 Old flame
- 🕊️ Romantic
Where and When Is Monkey Business Set?
Monkey Business is set in Oxly Chemical Company Laboratory and Fulton Residence (1950s). Here is why the time and place matter to the story.
When
1950s
The events unfold in a contemporary mid-20th-century setting, a corporate-research environment paired with suburban domestic life. Technology and social norms reflect the era's postwar tone, influencing how characters interact and how quickly mischief escalates. The tone mirrors a classic studio-era farce, where science and daily life collide with humorous consequences.
Where
Oxly Chemical Company Laboratory, Fulton Residence
The story centers around the Oxly chemical company's laboratory where the rejuvenation formula is created, tested, and mishandled. The Fulton residence offers a domestic counterpoint, showing family life and social dynamics affected by the lab's experiments. The setting blends professional science with suburban living, driving the comic chaos.
- 🏭 Laboratory
- 🏠 Home
- 🧪 Chemistry
What Are the Themes of Monkey Business?
3 ideas the story keeps returning to, among them Youth and Science, Marriage and Identity and Comedy of Errors.
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01
Youth and Science
A serum promises eternal youth, fueling fantasies of staying young and carefree. The science behind the elixir becomes a catalyst for character choices, secrets, and chaotic situations. The theme examines the costs of tampering with time and nature, all wrapped in lighthearted, farcical humor.
-
02
Marriage and Identity
The potion unsettles the dynamics of Barnaby and Edwina's marriage, forcing them to confront changing roles and desires. Romantic entanglements and assumptions are tested as the characters navigate transformed behavior. Despite the chaos, the story suggests that love and commitment survive through honesty and renewal.
-
03
Comedy of Errors
Mistaken identities and misapplied science propel a cascade of pratfalls and miscommunications. Characters oscillate between seriousness and whimsy as the potion's effects ripple through work, home, and social circles. The humor hinges on the clash between professional demeanor and childish impulses, resolving in a warm, reconciled ending.
What Kind of Film Is Monkey Business?
Whimsical in tone, with fast pacing and a straightforward story, going by the plot summary.
- Tone
- Whimsical
- Pacing
- Fast
- Story
- Straightforward
- Intensity
- Medium
- Ending
- Happy
A fast-paced, whimsical comedy that feels like a playful burst of chaotic energy, following adults who rediscover youthful freedom and mischief through a scientific mishap.
- playful
- chaotic
- upbeat
- mischievous
- nostalgic
- silly
- fountain of youth
- age regression
- screwball comedy
- scientific experiment
Quiz
How well do you remember Monkey Business? Test yourself on the story.
