In an effort to help an old friend through the breakup of his marriage, psychotherapist Marcus Llewellyn arrives in Germany to find up-and-coming prizefighter Charlie Pronovella in a state of such deep depression, he takes his old friend on as a client. But soon Marcus's faith in his own abilities to help Charlie comes into question when Charlie's behavior grows increasingly bizarre. Is Charlie suffering from a nervous breakdown, or are otherworldly forces at work?