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Sealed Cargo (1951) Plot Summary & Timeline

Sealed Cargo (1951) movie poster

Sealed Cargo is a 1951 drama and war film directed by Alfred L. Werker, running 1 hour 30 minutes. This page retells the whole story in 572 words (about 2 minutes to read) and covers 12 key events in order, 5 characters, where and when it is set and 3 themes. Looking for the cast, ratings and where to stream it? See the movie page for Sealed Cargo.

to read the plot summary
2 min
key events in the timeline
12
characters profiled
5
themes explained
3
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Sealed Cargo (1951) movie poster
Released
Runtime
1h 30m
Director
Alfred L. Werker
Genres
Drama, War
Original language
English
No spoilers

What Is Sealed Cargo About?

The premise of Sealed Cargo in 388 words, with nothing given away. The full story follows below.

In the winter of 1943 the Atlantic is a restless, unforgiving stage where the ordinary rhythms of fishing towns are constantly reshaped by the distant thunder of war. Off the coast of New England and far out on the Grand Banks, modest trawlers ply the gray seas, their crews bound by hard‑won camaraderie and an unspoken awareness that every horizon might hide a hidden threat. The film opens amid this stark, wind‑blown landscape, its tone a blend of gritty realism and low‑key tension that mirrors the uneasy calm before a storm.

The story follows the steadfast Pat Bannon, captain of the modest fishing vessel Daniel Webster. Bannon demonstrates a quiet, pragmatic leadership that has kept his crew safe through countless squalls, yet the war has infused his world with a new layer of suspicion. Joining him are the uneasy passenger Margaret McLean, whose presence hints at personal stakes beyond the sea, and two Danish sailors, Konrad and Holger, whose foreign accents and unfamiliar customs add a subtle undercurrent of intrigue. Their interactions are marked by a mix of pragmatic cooperation and guarded curiosity, reflecting the broader climate of distrust that pervades wartime ports.

While navigating through a thick fog, the crew discovers a damaged Danish sailing ship adrift on the water—its broken masts and battered hull a stark contrast to the sleek war machines prowling the Atlantic. The vessel’s mystery is palpable; the initial impression of a storm‑worn wreck soon gives way to whispers of something far more consequential hidden beneath its decks. The atmosphere tightens as the fishermen’s practical instincts clash with the eerie, almost cinematic aura of the abandoned ship, setting the stage for a tense exploration of loyalty, suspicion, and the hidden currents that run beneath even the most familiar seas.

Back in the rugged coastal village of Trabo, the tight‑knit community watches the drama unfold from the harbor’s edge. Locals and fishermen alike feel the weight of an escalating danger that could ripple far beyond their quiet town. United by a shared resolve to protect their homes, Bannon and his crew begin to contemplate a daring course of action—one that will test the limits of their courage and the bonds that tie them together. The mood remains tense yet hopeful, hinting at a collective ingenuity that may turn the tide against an unseen adversary.

Full plot

What Happens in Sealed Cargo?

The complete story of Sealed Cargo, from the first scene to the last, in 572 words (about 2 minutes). Spoilers throughout. Names in the text link to 4 cast member pages.

Spoilers ahead

In 1943, amid the Battle of the Atlantic, Captain Pat Bannon, Dana Andrews of the fishing trawler Daniel Webster, returns to his home port of Gloucester, Massachusetts, unloading his catch. He reluctantly agrees to transport Margaret McLean, Carla Balenda, to Trabo, a small community in Newfoundland. Shorthanded, he hires Danish sailor Konrad, Philip Dorn, and the Daniel Webster sails for the Grand Banks. Once at sea, another Dane, Holger, Eric Feldary, reports that the radio has been sabotaged. As Bannon knows all the crew well except for Konrad and Holger, he suspects one of them or even Margaret of being a German agent.

Sailing at night in heavy fog, they hear gunfire. They search for survivors and come upon the damaged Den Magre Kvinde (Danish for The Gaunt Woman), a Danish square-rigged sailing ship. She appears to have been damaged in a storm and then shelled. Aboard, they discover only the dazed Captain Skalder and a dead body. He claims that his crew abandoned ship in a storm, and that he was subsequently attacked by a U-boat. The Daniel Webster tows the stricken Kvinde to Trabo.

Konrad is suspicious: he notes that the German gunfire hit above the waterline (rather than below it, where a gunner intending to sink a ship would aim), and that while the tarpaulin covering the ship’s boat is riddled with bullet holes, the boat itself is undamaged. Bannon and Konrad separately sneak below decks to search the hold. When they meet, Konrad has a pistol, but he gives it to Bannon to prove where his loyalties lie. They accidentally discover a second, hidden hold containing rack upon rack of torpedoes — the ship is a tender, covertly resupplying the U-boat wolfpacks. They watch undetected as Holger enters the hold and uses a radio to signal the Germans. However, before the pair can alert the military, Skalder’s crew arrives in boats, so they pretend they know nothing. Skalder plans to resupply the U-boats at Trabo.

A Canadian flying boat lands in the harbor, and an officer inspects Skalder’s papers. Finding nothing wrong, he informs Skalder that a corvette will arrive the next day to inspect his cargo. Bannon offers to leave one of his two Danish crewmen as a witness, allowing him to rid himself of the spy Holger without arousing suspicion.

Bannon leaves port, but once out of sight, one man remains aboard to sail to the nearest radio station, while Bannon and the rest take to the dories and return. Bannon sets up a night ambush; when the Germans come to take the villagers prisoner, they are wiped out. Bannon and his men then set fire to the Kvinde under cover of darkness. In the resulting confusion, they board, overpower or kill the remainder of the crew, and free Margaret, who had been taken as a hostage.

Skalder claims to have set the ship to blow up in twenty minutes. Bannon does not believe him, but takes the ship out to sea, intending to destroy her safely away from the village. He and his men rig some torpedoes to explode. The Kvinde is approached by two U-boats seeking supplies. Skalder manages to get a gun and wounds his guard, Konrad, before he is killed. As a third U-boat surfaces, Bannon and another man help Konrad into a boat and row away under German gunfire. When the ship explodes, the resulting wave swamps the submarines, sinking them.

Timeline

Sealed Cargo Timeline: Every Key Event in Order

12 key events in the order they happen, from “Gloucester departure and mission” to “Aftermath and resolution”. 12 events name a place, across 12 locations.

  1. 1

    Gloucester departure and mission

    Captain Pat Banyon unloads his catch in Gloucester, Massachusetts, and reluctantly agrees to transport Margaret McLean to Trabo, Newfoundland. With a shorthanded crew, he hires Danish sailor Konrad and sets sail for the Grand Banks during wartime. The voyage begins under a cloud of caution as Banyon secures his crew and responsibilities.

    When:1943 Where:Gloucester, Massachusetts

  2. 2

    Crew assembled; tension rising

    Onboard, Konrad and Holger join the voyage, unfamiliar to Banyon. Tension rises as Banyon realizes he knows all his crew except these two, heightening his suspicion of loyalty. Holger reports that the radio has been sabotaged, fueling fears that a German agent may be aboard.

    When:Early voyage, 1943 Where:Atlantic Ocean, at sea

  3. 3

    Encounter with the Danish ship Kvinde

    In dense fog at night they hear distant gunfire and discover the Den Magre Kvinde, a Danish ship, damaged as if shelled after a storm. Aboard, Skalder claims the crew deserted after a storm and that a U-boat attacked him; the Daniel Webster tows the Kvinde toward Trabo.

    When:Night Where:At sea

  4. 4

    Kvinde's hidden cargo revealed

    Konrad and Banyon secretly search Kvinde's hold and uncover a hidden chamber filled with torpedoes, revealing that the ship is covertly resupplying U-boats. They realize Skalder is part of a covert operation to support wolfpacks.

    When:Soon after discovery Where:Inside Kvinde hold

  5. 5

    Holger signals the Germans

    They watch Holger enter the hold and use a radio to signal the German fleet, unobserved by Skalder's crew. Before they can alert authorities, Skalder's men arrive by boat, and the incident is momentarily brushed off. Skalder plans to resupply U-boats at Trabo.

    When:Soon after Where:Kvinde hold; vicinity of Trabo

  6. 6

    Harbor inspection and witness offer

    A Canadian flying boat lands in the harbor and an officer inspects Skalder's papers, finding nothing wrong. He informs Skalder that a corvette will inspect the cargo the next day. Banyon offers to leave one Danish crewman as a witness to root out Holger without arousing suspicion.

    When:Next day Where:Trabo harbor

  7. 7

    Escape plan and ambush underway

    Banyon sails out of port with the rest of the crew while one man remains aboard to signal the nearest radio station and the others take fishing dories back. That night, he sets up an ambush to prevent the Germans from seizing villagers.

    When:Night Where:Trabo harbor / village

  8. 8

    Ambush, Kvinde set ablaze, and hostage freed

    The German party attempting to seize villagers is wiped out in the ambush; the crew then sets fire to the Kvinde to destroy evidence and cover their escape. Margaret is freed from her hostage position as the chaos unfolds.

    When:Night Where:Trabo, Newfoundland

  9. 9

    Skalder's countdown and plan to move out to sea

    Skalder claims the ship is set to explode in twenty minutes, but Banyon suspects it is a ruse. He instead drives the Kvinde out to sea to keep the danger away from the village.

    When:Daylight Where:Off Trabo

  10. 10

    U-boat confrontation begins

    Two U-boats approach seeking supplies as Skalder wields a gun and wounds Konrad; Skalder is killed in the confrontation. A third U-boat surfaces, forcing Konrad and Banyon to escape by boat under heavy fire.

    When:During engagement Where:Off Trabo, Atlantic

  11. 11

    Escape and submarine sink

    Banyon and another man help Konrad into a small boat and row away as gunfire erupts from the German vessels. The Kvinde explodes and a massive wave swamps the submarines, sinking them.

    When:Moment of explosion Where:Near Kvinde, Atlantic

  12. 12

    Aftermath and resolution

    With Margaret safe and the German threat eliminated, the Daniel Webster's wartime mission ends in a display of courage and loyalty. The tense rescue underscores how civilians and sailors triumphed over espionage and piracy on the Atlantic.

    When:Aftermath Where:Off Newfoundland coast

Characters

Who Are the Main Characters in Sealed Cargo?

5 characters, among them Pat Bannon, Konrad and Holger: who each one is and the part they play in the story. Every profile links to the actor’s page.

  • Dana Andrews as Pat Bannon in Sealed Cargo

    Pat Bannon

    Played by Dana Andrews

    Captain Pat Bannon is a weathered leader who reluctantly agrees to transport Margaret McLean. He orchestrates a daring plan to uncover the spy among his crew and protect the village, balancing skepticism with decisiveness. His experience at sea makes him practical, resourceful, and determined to see the mission through.

    • ⚓ Veteran
    • 🎖️ Leader
    • 🛡️ Steadfast
  • K

    Konrad

    Played by Philip Dorn

    Konrad is a Danish sailor whose loyalty is tested as he partners with Bannon to uncover the spy. He is cautious, intelligent, and morally aware, guiding strategic choices and showing willingness to trust and sacrifice for the mission.

    • ⚓ Loyal
    • 🎯 Cunning
    • 🇩🇰 Danish
  • H

    Holger

    Played by Eric Feldary

    Holger is a Danish crew member whose allegiance becomes a focal point of suspicion. His signaling of the Germans reveals the complexity of wartime loyalties and the danger presented by unseen enemies aboard the ship.

    • 🎭 Ambiguous loyalties
    • 🕵️ Suspicious
    • 🌊 Danish
  • Claude Rains as Captain Henrik Skalder in Sealed Cargo

    Captain Henrik Skalder

    Played by Claude Rains

    Captain Skalder commands the Danish vessel Den Magre Kvinde and is revealed to be using the ship as a covert means to resupply U-boats. His deception and ultimate fate reflect the moral compromises of wartime.

    • 🎭 Deceptive
    • 🗡️ Ruthless
  • MM

    Margaret McLean

    Played by Carla Balenda

    Margaret is the passenger who becomes a central motive for the voyage. Initially a hostage, she grows into a symbol of resilience and hope as the crew fights to protect her and bring the mission to a safe conclusion.

    • 👩 Passenger
    • 🕊️ Resilient
    • 💪 Protective
Setting

Where and When Is Sealed Cargo Set?

Sealed Cargo is set in Gloucester, Massachusetts, Trabo, Newfoundland and Grand Banks (1943). Here is why the time and place matter to the story.

When

1943

Set during World War II, the story takes place in the high-tension Battle of the Atlantic. Naval patrols, German U-boats, and covert resupply missions set the backdrop as Allied ships attempt to keep vital Atlantic convoy routes open. The fog-bound night crossings and damaged Danish vessels reflect the era's uncertainty and danger. The events lead to a climactic confrontation that tests courage and loyalty.

Where

Gloucester, Massachusetts, Trabo, Newfoundland, Grand Banks

The film unfolds along the Atlantic from the fishing port of Gloucester to the remote Newfoundland community of Trabo and the perilous Grand Banks fishing grounds. Gloucester is depicted as a working harbor where Captain Pat Bannon makes his living with the Daniel Webster. The voyage north into fog-bound seas places the ship amid perilous weather and hidden wartime dangers. The locales emphasize both small-town resilience and the strategic wartime sea lanes of 1943.

  • 🧭 Atlantic voyage
  • 🗺️ Sea town
  • 🛥️ Fishing port
Themes

What Are the Themes of Sealed Cargo?

3 ideas the story keeps returning to, among them Loyalties, Duty and Courage.

  1. 01

    Loyalties

    Suspicion drives much of the plot as Bannon must determine who among the Danish crew and passengers can be trusted. Hidden loyalties surface under pressure, revealing a fault line within the crew. The tension between personal loyalties and duty anchors the action from start to finish. The story uses secrecy to explore what people will do to survive in wartime.

  2. 02

    Duty

    Duty to ship, crew, and village motivates Bannon’s decisions and actions. The captain balances pragmatism with protection of civilians, ultimately risking his life to prevent a larger catastrophe. The crew’s willingness to act when needed demonstrates maritime honor under fire. The war sets a framework where personal choices become matters of life and death.

  3. 03

    Courage

    The voyage tests nerve as the group confronts sabotage, hidden torpedoes, and a daunting river of German agents. Boarding, firefights, and a risky escape across churning seas highlight collective bravery. The crew’s persistence allows them to outmaneuver the enemy and safeguard the innocent. The conclusion emphasizes resolve in the face of overwhelming odds.

Tone & mood

What Kind of Film Is Sealed Cargo?

Tense in tone, with steady pacing and a straightforward story, going by the plot summary.

Tone
Tense
Pacing
Steady
Story
Straightforward
Intensity
High
Ending
Bittersweet

A steadily tense and suspenseful naval thriller set during World War II, where a fishing boat captain uncovers a deadly enemy supply ship and undertakes a dangerous mission of sabotage amidst constant threat.

  • tense
  • suspenseful
  • urgent
  • claustrophobic
  • methodical
  • world war ii
  • espionage
  • naval warfare
  • deception
  • survival at sea

Content notes: war violence, gun violence, hostage situation.

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FAQ

Sealed Cargo Plot Questions

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

What is Sealed Cargo about?

In the winter of 1943 the Atlantic is a restless, unforgiving stage where the ordinary rhythms of fishing towns are constantly reshaped by the distant thunder of war.

Read the full plot summary

When and where does Sealed Cargo take place?

Sealed Cargo is set in Gloucester, Massachusetts, Trabo, Newfoundland and Grand Banks (1943). Set during World War II, the story takes place in the high-tension Battle of the Atlantic. Naval patrols, German U-boats, and covert resupply missions set the backdrop as Allied ships attempt to keep vital Atlantic…

The setting explained

Who are the main characters in Sealed Cargo?

The story follows Pat Bannon (played by Dana Andrews), Konrad (played by Philip Dorn), Holger (played by Eric Feldary) and Captain Henrik Skalder (played by Claude Rains); the character guide covers 5 characters in all.

All the characters

What are the main themes of Sealed Cargo?

The summary picks out 3 themes: Loyalties, Duty and Courage.

The themes explained

Who directed Sealed Cargo?

Sealed Cargo (1951) was directed by Alfred L. Werker and runs 1 hour 30 minutes.

Alfred L. Werker’s films

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