Dr Chandrix isn't a typical blackmailer. He's tricky, devious, artful, and he isn't interested in money. What he craves is knowledge and power, and he knows exactly how to get them. When Special Branch Police skilfully trap him, justice seems certain. That is until their agent disappears. The case now in ruins, they recruit a reluctant Dutch psychologist spotted in Brighton. It now falls on Dr Straay to confront this man, an old enemy, and find a way to stop him before someone else disappears...