Loosely based on the trial of Nicola Sacco and Bartolomeo Vanzetti, this adaptation of Maxwell Anderson's Broadway play featured Burgess Meredith (in his film debut), Eduardo Ciannelli, and Margo, re-creating the roles they had originated on stage. In a prolog set in the 1920s,
Ciannelli, accompanied by Stanley Ridges and Paul Guilfoyle, steals a car that is used in a payroll robbery. The paymaster is murdered and the automobile abandoned. When the car is found, the police discover some of John Carradine's writings inside and wrongfully pin the murder on him. Meredith,
the son of Carradine, wants to prove his father's innocence 15 years later, and learns that Guilf...