One Thursday evening Shelley Lunt is found hanging in a flat belonging to Johnny Ace - local DJ turned Private eye. Although everthing points to suicide, Shelley's sister Linda is convinced that she would never have taken her life, and hires Johnny to investigate. Johnny has his own problems, he is woken by policemen smashing their way into his flat looking for stolen goods- and they find them. Out on bail, Johnny is determined to find out who framed him and whether it's connected with Shelley's death. One by one, Johnny's witnesses are found dead, and Johnny must fight to save his own life.