Little did San Francisco detectives, Mackenzie and Fergusson know, that there was a chilling and restless secret in a couple's backyard. The detectives however, would later find out about the forty-one-year-old mystery first hand. However, during the investigation it was clear that they were after an escaped mental patient on a murder spree.

Also, the discovery of major cover-ups, by one of San Francisco's elite Doctors, fifty-eight years ago, would prove even vengeful and deadly.