Vicky Van is a nickname for Victoria Van Allen, an enigmatic woman of, apparently, higher society, who keeps her past secret but is open to make new friends and acquaintances. She organizes bridge parties in her saloon, which are attended by prominent people. Once, one of her guests is found murdered, and Vicky vanishes before the police are summoned. Yet, her neighbor, Chester Calhoun, believes Vicky is innocent. The investigation of the murder brings a lot of twists and an unexpected finale.