Phil Townsend suffers amnesia after he is mugged outside his drug store. All he remembers is that he is about to get married. A taxi driver takes him to his fiancée's house, but he discovers that she is already married and has been married for three years. Later, Townsend discovers that he has been living under the name David Webber for three years. He discovers that Webber was once the bodyguard of a rich criminal attorney and is suspected of murdering the attorney's wife. Townsend eventually manages to clear his name. Later, he checks into a hospital for treatment.

Fred Kruger, Al Norman, and Terry are three ex-convicts who are now gainfully employed as garage mechanics. One day, they decide to break into a payroll office. They are unable to open the safe, so the take it with them to the garage. Unfortunately, the safe contains, not only money, but also a lethal radioactive isotope which, if released, could poison the city.

Newlyweds Dave and Bonnie Snowden visit the abandoned home of Bonnie's late father. In the home, Dave finds a locked door and comes to believe that there is something valuable inside. Later, Dave and Bonnie tell Bonnie's elderly mother Mrs. Daniels that they are married. Bonnie's mother is convinced that Dave is after her daughter inheritance. She tries to bribe Dave to annull the marriage. Dave refuses, but he is desperate for money. In an effort to convince Bonnie's mother of his good intentions. He convinces Bonnie to fake a suicide attempt by overdosing on sleeping pills. Dave hopes that Mrs. Daniels will see him caring for her and change her mind about him. Unfortunately, Bonnie is allergic to sleeping pills and accidently dies. After the funeral, Mrs. Daniels tells Dave that she has had a change of heart. She gives him the abandoned house. Dave heads to the home and again wonders what is behind the locked door. As he talks to himself,