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.

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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.