Still haunted by his failure to prevent the murder of a young couple years earlier, a mixed martial arts teacher must confront the skeleton in his closet when the boy who was orphaned by the killing shows up at his door.

Retired assassin, Jack Lee, walked away from his violent past to raise his dead brother's daughter, Jaime, as his own. When crime lord Banducci kidnaps Jaime for a payback, Jack brings his gifted skills of extermination out of retirement and the streets of San Francisco become a battleground for a one man killing machine and ruthless, united mob bosses.