The Sweeper is an action-filled thrilling drama about a renegade cop out for vengeance. Mark Goddard (C. Thomas Howell) is the son of a police officer, Dale Goddard (Jeff Fahey), who witnesses the slaughter of his father and the rest of his family by a murderous group who also tries to kill him. Young Mark (Max Elliot Slade) is able to escape death but never quite gets over the rampage that took place in his own home. As an adult, Mark is an undercover police officer who is filled with anger and hatred as he fails to solve his family's murder. He is approached by a vigilante group, Justice Incorporated (JI), and accepts their offer to join in their cause with the promise that they will reveal the names of his family's killers. Mark finds it all too easy to carry out JI's missions of revenge until he discovers the secret they are keeping about his past.