
A private detective solves cases in Los Angeles.

The death of a secretary prompts her employer, a middle-aged banker (William Windom), to hire Cannon to investigate.

A trucking company plagued by a series of hijackings hires Frank Cannon to investigate.

An insurance company hires Cannon to investigate the plane-crash death of a country-and-western singer.

Cannon is called in when a gubernatorial candidate wants to avoid police involvement in rescuing his kidnapped son.