A demoted detective is given the opportunity to go undercover and take down the mob's most ruthless killer, but his life and only chance at redemption spiral out of control as he loses himself in the role.

在Jon（约瑟夫·高登-莱维特 Joseph Gordon-Levitt 饰）的人生里他只在乎这几件事：健身、飙车、去教堂、泡妞和看色情录像。虽然Jon的周围并不缺少和他上床的漂亮姑娘，可是Jon从来没有从与这些女孩的关系中得到满足感。相反，只有在看色…