Ed Kemper appears to be a gentle giant who offers rides to young female hitchhikers. But behind his charming smile lurks a perverted monster. Recorded audio confessions reveal the dark fantasies behind one of America's most notorious serial killers.

Fearing arrest, Kemper decides he must finally deal with his mother, bringing this story to a devastating finale. In custody, a psychiatrist gives Kemper a "Truth Serum," which reveals his most horrifying secrets on tape.