A man living in an abandoned shack stalks and murders an entire family—a respected doctor, his wife, two young sons, and their secretary—in 1970 California. Investigators initially feared another Manson-style cult killing, but the real culprit was a mentally ill drifter driven by apocalyptic delusions about the rich destroying Earth. John Lindley Frazier broke into the Ota home multiple times to steal a .22 pistol and binoculars, then orchestrated the murders by calling Dr. Ota's office to disrupt the family's routine so victims would arrive separately and be easier to ambush.