AllMovie

Although he no longer works for the insurance company that had hired him to track down the stolen Jokarta Diamond, shady private detective Jack Mallory (Michael Pate) has never given up the chase. Worming his way into the confidence of Katherine Stewart (Phyllis Hill), Mallory puts a tail on Katherine's husband Philip (Phillip Pine), recently released from prison after serving a manslaughter charge--and the primary suspect in the theft of the elusive diamond. After a confrontation in which he demands that Phillip reveal the diamond's whereabouts, Mallory is murdered--and Perry Mason (Raymond Burr) is hired to prevent "number one suspect" Phillip Stewart from going back to prison for keeps.