The third of five films (Dial Red-O, Sudden Danger, Calling Homicide, Chain of Evidence, and Footsteps in the Night in release order and released across a full period of three years) in which Bill Elliott played a detective lieutenant (Andy Flynn in the first one, Doyle in the others) in the Los Angeles County Sheriff's homicide department) with all five produced by Ben Schwab but a different director on each one. Lieutenant Andy Doyle of the Los Angeles Sheriff;s homicide department, while investigation the mysterious dynamiting death of a young policeman, discovers that the strangling-murder of Francine Norman, owner of a modeling school, is linked with the first killing. While questioning those connected with the school, manager Darlene Adams, and executives Allen Gilmore and Tony Fuller, Lt. Doyle and his aide, Detective Sergeant Mike Duncan, find there is a blackmailing "baby racket" being run in conjunction with the school. Suspicion points to construction company owner Jim Haddix who had been in love with Francine. All evidence of the baby extortion racket is destroyed by an explosion, and the hunt narrows down to one man, the school handyman.