Private detectives work for some people and against others.But Jerry Browning once had a client who he first sent to jail. Stevie Mellor had been sent to prison for 5 years on Jerry's evidence but now he was out of jail and going straight. He had even made a pal of his cell mate, Larry Markle, while in prison but now that pal was dead and Melon didn't believe he had died of a heart attack. He wanted Jerry to find out who had killed him and why.