Marty Blair, an alcoholic pianist and composer, watches as his anniversary plans collide with a bitter reality: he longs to see his ex-wife Mavis Marlowe, but she refuses to see him, even after he sends her a giant ruby brooch. She orders the doorman to keep him out, and when Marty tries to enter, the doorman — Dick Wessel — firmly ejects him. Disheartened and furious, he sinks to the sidewalk, noticing another man being admitted to her swanky building. The sight stings him deeper, and he trudges to his corner bar to drown his sorrows in drink.
That same evening, Kirk Bennett arrives to visit Mavis. He is allowed upstairs by the same doorman, but tragedy strikes inside: Mavis is murdered, and a suspect emerges as a missing ruby brooch vanishes from her dress. A prowler is heard in the apartment, and Kirk searches for the intruder, who slips away. As the scene unfolds, the public face of danger shifts, and the missing brooch becomes a crucial clue in a case spiraling out of control.
Seen fleeing the chaos, the married Kirk Bennett is soon captured by Captain Flood of the Los Angeles Police Department. Flood claims Mavis was blackmailing him to hide their affair but cannot prove who else might have been in the apartment that night. The evidence is thin, and Kirk is ultimately convicted of murder and sentenced to death, leaving his wife Catherine Bennett to fight for an innocence she’s not sure still exists.
Catherine, a steadfast yet practical woman, refuses to abandon her husband and begins her own determined investigation. She follows the threads of a man’s alibi, some misdirection, and the fragile support of people who know Marty Blair from the corners of his life. A mothering friend who tends to Marty during his bouts of drinking clears him in ways the police have not, strengthening Catherine’s resolve to dig deeper into the case and its tangled motives.
The trail leads them to a nightclub owned by the enigmatic Marko, where Catherine and Marty, now working together in a more intimate way, decide to go undercover as a performing duo to get closer to the truth. Marty, ever perceptive, notices an envelope from Mavis’ personal stationery in Marko’s office, a finding that suggests the blackmail thread ties back to her. When Catherine proposes a quiet search in Marko’s absence, Flood arrives to keep a lid on things, and Marko admits he had been blackmailing Mavis over his ex-con past, but insists the missing brooch isn’t in his safekeeping. The suspect is cleared, yet the mystery remains.
As their investigation deepens, Catherine and Marty’s partnership in both detective work and music grows stronger. Their onstage act brings a new sense of glamour into Marty’s life, and for a while, he manages to stay sober. The emotional tension blossoms into something more personal when Marty confesses his love for Catherine on the eve of Kirk’s scheduled execution. Catherine, however, makes it clear that Kirk has always been the man she loves, and she remains committed to him, even as she respects Marty’s feelings.
The emotional strain drives Marty toward a desperate drinking spree, and a twist of fate pushes him toward a dramatic discovery. In a euphoric haze, he encounters a woman wearing a missing brooch, and a fleeting memory jolts him: perhaps he himself placed the brooch on that woman the night of the murder. A painful flashback crystallizes the truth: Marty had strangled Mavis and taken the brooch, then used the janitor’s access to reach her apartment while the doorman’s attention was elsewhere.
Marty tries to contact Flood to confess in time to save Kirk, but Flood is tied up on another case. After several failed attempts, he leaves a message for Flood to call him at Catherine’s home, only to be found asleep when the phone finally rings.
Come daylight, Catherine returns from visiting Kirk in prison to say a final goodbye. She awakens Marty, who begins to confess, while Flood arrives to listen in. The story—so improbable it feels almost fantastical—has a haunting sense of inevitability as the missing brooch clenches the situation. Flood makes a crucial call to the governor to request a stay of execution, and the immediate outcome seems to be that Kirk will be saved. Still, the truth lingers in the shadows: the confession, the guilt, and the complicated loyalties that tie these characters together.
In the end, the fog of misdirection clears in a way that brings a painful balance to everyone involved. Kirk’s fate is saved for the moment, Catherine’s marriage endures in a difficult compromise, and Marty’s revelation leaves a lasting stain on the night’s events. The film closes on the uneasy note that truth can be as fragile as memory, and the people who seek it must live with the consequences of what they discover.
