Infamous burglar "The Bat" commits a daring jewelry theft despite heavy police presence. Soon after, a bank theft occurs, which may be the work of the criminal as well. Meanwhile, Cornelia Van Gorder has various people arrive at her old mansion, including her niece, Dale, a bank employee, and police detective Anderson. When guests start turning up dead, Cornelia begins to suspect that The Bat may be lurking around the estate.
Society matron Mrs. Livingston Baldwin Crane is selected as a juror in the trial of former chorus girl Yvette Gordon, who's accused of murdering her rich older husband. In court and during deliberations, Mrs. Crane proves to be a disruptive and unorthodox juror.
A Depression-downtrodden waif uses her brains instead of her body to rise from tyro con artist to crime boss.
