
A private detective solves cases in Los Angeles.
Cannon becomes the target of a sniper when a mercenary (Jack Cassidy) hires the detective for a murder investigation.
On a mission to deliver ransom money, Cannon falls prey to opportunists while wandering in the desert with amnesia.
A shy heiress hires Cannon to stop attacks of vandalism she claims are the handiwork of her long-missing sister.
A harassment campaign is directed at a doctor (Vera Miles) engaged in a medical research project at a state prison.