Nightclub owner Philip Richards [Ricardo Cortez] announces that he will marry Helen Armstrong [Maris Wrixon] and plans to sell the club to George Kilpatrick [Theodore von Eltz]. A local racketeer, Schaffer [John Gallaudet], grows wary of Philip’s decision to turn down a bigger offer and issues a threat that puts Kilpatrick in the crosshairs. Philip’s ex-girlfriend Clare Winters [Lucia Carroll] tries to stop the sale, even pulling a pistol in a tense confrontation that Philip wrests away and safely hides. The tension thickens as a reporter, Peter Kennedy [William Lundigan], who is secretly in love with the club’s singer Dixie Waye [Nan Wynn], crosses paths with Kilpatrick at the airport, only to witness Kilpatrick get shot on his way to a taxi, a shock that rattles everyone connected to the club.
Peter’s rival for Dixie’s affection, Lieutenant William Ryder [Regis Toomey], starts grilling Philip about Kilpatrick’s murder, while at Philip’s apartment, William is introduced to Philip’s fiancée, Helen Armstrong, and her brother Roger. On Clare’s side, the waiting game continues as Clare herself vanishes, leaving Peter to piece together the missing person’s puzzle. Soon, William and Peter learn that Roger has been attacked in his own apartment, and a handkerchief bearing the initials “A. M.” is left behind as a clue. Peter suspects Al Martin [Noel Madison], a man who had recently left town, as a possible motive or accomplice.
The case takes another turn when Clare’s body is discovered, along with the gun Philip had hidden earlier. An elevator boy’s testimony—describing a man matching Philip’s description on the same floor as Clare’s room—adds to the mounting suspicion. William moves to arrest Philip, who initially confesses to the murder only to pull a gun and slip away into the night. In his mind, he believes he’s protecting someone else, and the truth about what happened begins to blur.
Dixie finds herself courted by Roger, and a paparazzi photographer captures them together, complicating loyalties further. In a burst of jealousy, Helen fires Dixie, and Peter catches onto the unsettling notion that Helen’s ties to Roger aren’t as tight as they seem. A round of intense questioning follows, and Helen finally admits that she killed Clare in self-defense when Clare threatened her life. William learns, through a telephone update, that Clare is actually George Kilpatrick’s ex-wife, which casts new light on the tangled motives at play.
The confrontation escalates as William corners Helen and Phillip—who has been hiding in Helen’s home—emerging from the shadows. Helen and Roger attempt to flee, but they are pursued, captured, and eventually confess to both murders. William explains to Peter that Al and Clare had been trying to derail Philip’s engagement and that Philip was trying to shoulder Clare’s murder to shield Helen from consequences. In the end, with justice looming, the two would-be romantics approach Dixie for a date, only for her to walk off with a naval officer, leaving the night’s broken lives to face the consequences of the truth.
