Peter Cornish is the fast-talking beau of Jean Rankin, whose young stepmother Lydia is being blackmailed by Jack Donovan. Donovan has extorted enormous sums of money from Lydia, who wants to prevent him from revealing a romantic episode from her single days. After Donovan loses a bet on a horse in the Santa Anita Handicap, he telephones Lydia’s suspicious husband Michael for an invitation to dinner. Donovan abruptly discards his girl friend, and as he drives off, she jumps up on the dashboard and is killed in an automobile accident. At the Rankin dinner, while the lights are turned out so that Donovan can demonstrate his “glow-in-the-dark” ring, he is murdered. The idiotic Inspector Killian arrives to solve the case, accompanied by an only slightly less foolish sergeant, who is also a writer. While Peter’s suggestions guide Killian’s investigation, Rosenkrantz, the new coroner, is terrified of the corpse. Reporters arrive at the Rankin house, and during Killian’s questioning, Michael stands by his wife. During a re-enactment of the crime, another man is killed, and later a letter is found from “Ginger” in which Donovan’s life is threatened. Jean and Peter flee the suspicious Killian and become lost among the other couples on Flirtation Lane. At the morgue, Peter notices that the girl killed in the accident, Caroline Holmes, had ginger-colored hair. Peter and Jean return to re-enact the crime a second time, and Peter makes himself the target. When the lights go on, he is wrestling with Nelson, the butler, who was Caroline’s father. With the murder solved, Peter and Jean return to Flirtation Lane. More on Wikipedia or Mubi
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