The shocking true story of serial killer William Bonin (Scott Leet), who stalked California freeways in search of victims to murder, mutilate, and rape from May of 1979 through June of 1980. A deceitful charmer with a hair-trigger temper, Bonin could go from benevolent citizen to murderous psychopath in the blink of an eye. Throughout the course of his crime spree, the killer and his small group of deeply-disturbed accomplices succeeded in claiming at least 21 lives before their reign of terror came to an end.