In this dark, jagged true crime thriller, wily mob head Gregory Scarpa Sr. (alias the "Grim Reaper") secretly steals and kills under FBI protection for decades. When faced with arrest for his own crimes, he betrays his adoring son, Gregory Jr., whom he'd groomed to take his place. Taking the fall for his father out of familial respect and love, the young Scarpa endures decades of maximum security imprisonment by furnishing the feds with detailed intelligence regarding the September 11 attacks and the Oklahoma City bombings.