One of the wealthier sections of San Francisco is being terrorized by a crime wave. Studying the pattern of events, Ironside (Raymond Burr) figures out that the crimes are being planned and executed in the manner of a chess game. It now falls to the Chief to "checkmate" the two depraved socialites (Noel Harrison, Scott Marlowe) who are using their victims as human pawns in a sinister game that threatens to turn lethal at any moment. ~ Hal Erickson, Rovi