When Boston Blackie performs magic tricks at a Thanksgiving Day party for the inmates of a women's prison, Dinah Moran (Constance Dowling) volunteers to enter a booth. She disappears after he draws the curtain, but as a former magician's assistant, uses the opportunity to escape. Police Inspector Farraday (Richard Lane (actor)) takes Blackie into custody as an accomplice, but Blackie easily gets away himself.