In 1952, Muffy and Duffy are about to go off to college. They are amateur detectives who want to solve one last case before they leave. The Phantom is a criminal master mind who seems to be one step ahead of the twins. Duffy is determined to find her. Sadly the young man is framed and sent to prison. Twelve years later, he comes out a changed man. Still determined to find his sister but also get revenge on the men who framed him. He plans to make them and their daughters pay.