A Window in London

Pat finishes a night shift as a hotel switchboard operator at a prestigious London block and feels exhausted. She walks home to her new husband Peter, a crane operator who works by day on Waterloo Bridge. Their life is happy but cramped by opposite schedules, and colleagues joke about Peter's 'night starvation'.

On his Tube ride to work, Peter witnesses what looks like a balcony murder: a man stabbing a woman. He follows the scene to the residence, where magician Zoltini and his wife Vivienne claim they were rehearsing an illusion. Zoltini's temper surfaces as he hands back Peter's money and asserts the incident is not what it seems.

Back home, a reporter pursues a story about a heroic rescue and the inspector records Peter's name. The evening paper runs a photo and a story declaring him a hero, but his coworkers mock him once they realize the knife was fake.

After work, Peter visits Zoltini's studio and only Vivienne is there. She invites him to come and see their act that evening, planting seeds of tension for Zoltini when he learns Peter has been around.

Max, an impresario, is attracted to Vivienne and offers to take her away for better gigs. Peter goes to the dressing room to collect a free ticket, and Zoltini appears, angry and suspicious about Peter's continued presence.

Before the show, Zoltini and Vivienne quarrel and he slaps her. In the final trick, Vivienne vanishes but does not appear in the trunk, prompting boos and her dismissal. She leaves with Peter, and they later go to his Waterloo Bridge crane.

Pat arrives at the hotel for her shift and is dismissed for her perceived shortcomings the previous night. The job loss compounds the strain on her and Peter's precarious domestic balance.

A revengeful Zoltini goes to a cafe where he has been told he will find the taxi driver and questions him, setting in motion a pursuit of those he holds responsible for his troubles.

In Max's nightclub, Peter is entertained by a hostess while Max talks with Vivienne. Peter gets drunk on champagne, and Vivienne realizes her handbag is missing from the crane and asks him to retrieve it.

Zoltini arrives, recognizes the bag as Vivienne's, and attacks Peter. The struggle ends with Zoltini falling into the river and floating away unconscious. Peter returns to the nightclub, where Vivienne signs a contract with Max, who claims to have killed Zoltini.

The hotel guest who missed his flight is pleased with the outcome of a crash and insists the manager re-employ Pat, offering her a job as his secretary. Pat's life seems to be moving toward a fresh start.

Pat begins a new day job, while Peter drifts through the city in a daze and confesses that he believes he has killed a man. The river police subsequently pull Zoltini from the water alive, complicating their outlook on the events.

Zoltini and Vivienne briefly reconcile, but he discovers Vivienne's contract and a New York ticket left by Max. He shoots Vivienne dead as a Tube train passes, sealing the tragedy that has threaded through the couple's lives.

Pat and Peter ride past the window where their story began, still hoping for happiness despite the carnage around them. Peter reveals that the window marks where it all started, underscoring the uneasy balance between luck and danger that shadows their lives.