In the late 1960s and early 1970s, law enforcement discovered a pattern of murdered hitchhikers and young men; their investigation led them to an unassuming aerospace engineer, who lived a double life as a sadistic killer.
With Patrick Kearney behind bars, police realize another predator is on the loose; an investigation leads to "The Freeway Killer" and his torture chamber on wheels; the murders suggest the work of more than one single killer.
