A team of two-fisted insurance investigators (one of whom disguises himself as The Masked Marvel) endeavor to discover and thwart the loathsome saboteur Sakima.

A federal agent's life is in danger when he's exposed while investigating a parole scheme.

Novice policemen Stan and Ollie bungle a burglary investigation.

A private detective is approached by a wealthy entertainment executive to stop a blackmail scheme against him. Although he hasn't decided to take the job, the blackmailers believe that he already has, and he is marked for murder.