The third of five films (Dial Red-O, Sudden Danger, Calling Homicide, Footsteps in the Night and Chain of Evidence in release order and released across a full period of two years) in which Bill Elliott played a detective lieutenant (Andy Flynn in the first one, Doyle in the others) in the Los Angeles 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.
On their honeymoon,a young navy officer and his wife are having difficulties in finding a hotel room in Los Angeles until a lady lends them her suite. There, they receive a mysterious telephone call warning them of a murder that is about to be committed. After finding two dead women they hire two private detectives to help them. They learn that the third woman marked for death is the woman who lent them her hotel suite. She is the aerial artist at a circus and the other two women were her friends. The police arrive and arrest the navy officer and his wife, and two clowns who were attempting to kill the aerial performer. The two men who were posing as private detective were the killers.