Seeking justice: Will Gerard is a family man whose life is turned upside-down when his wife, Laura is brutally attacked one night while leaving work. Will is aproached by Simon who offers to have a stranger exact vengeance on Laura's attacker, in exchange for a favor in the near future.
Law abiding citizen: Clyde Shelton is a brilliant planner and inventor. One night two robbers invade his Philadelphia home and brutally kill his wife and daughter, almost killing him. When the killers are caught, Assistant DA Nick Rice is assigned the case. Nick makes a deal with one of the killers to testify against his partner for a 10-year plea bargain prison sentence. Clyde doesn't want Nick to make the deal, but Nick says the deal is done. The other killer gets the death penalty. After 10 years, the other killer is released from prison, and he soon ends up dead. Clyde is arrested and vaguely admits to Nick that he did it. Clyde is put in jail, and he warns Nick that he must fix the broken justice system that failed him and his family or else anyone connected to his case will soon die. Even from jail, Clyde's threats become a reality, and Nick must stop Clyde before his family is next.