In a tense wartime espionage thriller, Robert Emmett 'Bob' Sharkey is put in charge of a group of American espionage candidates, a task that quickly reveals the movie’s chessboard of deceit and danger. His commanding officer, Charles Gibson, breaks the news that within the trainee cohort lies a German Abwehr agent. The searchhorse is a calculated risk: the traitor is masquerading under the name William H. 'Bill' O'Connell, though his true identity is the formidable Wilhelm Kuncel, one of Germany’s top spies.
From the start, the mission is double-edged. The aim is to uncover the date and location of the Allied invasion of Europe, a piece of intelligence that could tilt the war’s balance. To coax misinformation through the lines, O’Connell is posted to London with access to a carefully planted false trail about “Plan B,” a supposed invasion of Germany via the Lowlands, in the hope that the misdirection will reach the right ears back in Berlin.
Three agents—Suzanne de Beaumont, a Frenchwoman played by Annabella, Jeff Lassiter (Frank Latimore), and the test subject O’Connell—are dispatched to Britain to prepare for infiltrations behind enemy lines. O’Connell’s cover is tailored to his familiarity with the Dutch-Belgian region, sending him toward Holland, while Lassiter is given a mission of paramount urgency: kidnap the French collaborator Duclois, who designed and built the main V-2 rocket assembly and supply depot slated to strike the key invasion port of Southampton. Suzanne accompanies Lassiter as the radio operator, creating a tight, perilous trio that will push the boundaries of trust and loyalty.
Tension escalates as Sharkey, under orders to act if deception is suspected, is told to kill Kuncel if necessary. On the flight, Lassiter’s intuition gnaws at him, and Kuncel—never fully trusting the situation—sabotages Lassiter’s parachute, sending him to his death. The mission fractures, and Gibson and Sharkey confront the brutal reality: Kuncel now suspects that the deception has not fully penetrated his cover.
With no time to reassemble a fresh team, Sharkey volunteers to step into Lassiter’s shoes, a dangerous gambit that could reveal the invasion’s true timing. The resistance in France, organized by the town’s mayor Mayor Galimard, swings into action; together they corner Duclois, and the prisoner is brought to England. Yet the clock ticks relentlessly. In a last bid to maintain control over the fragile deception, Kuncel escorts Sharkey to the Gestapo stronghold at 13 Rue Madeleine in Le Havre and subjects him to brutal torture when the truth refuses to surface.
Back in Britain, Gibson has to improvise a devastating counterstrike: a bombing raid aimed at destroying the building before Sharkey breaks. As the sky roars with impending destruction, Sharkey confronts Kuncel with a chilling, almost defiant smile—the moment of triumph he clung to as the bombs begin to rain down, a stark testament to the cat-and-mouse drama of wartime espionage.
What lingers is a stark portrait of courage under pressure, the fragility of trust, and the high price of deception in war. The film threads its suspense through claustrophobic interrogations, high-stakes assignments, and a relentless push-pull between covert operators who gamble everything for a sliver of truth.
