Will Gerard, is a happily married family man whose quiet life is turned upside-down when his wife, Laura, is brutally attacked one night while leaving work.

At the hospital, waiting for news about his wife's condition, Will is approached by Simon, who proposes an intriguing offer: Simon will arrange to have a complete stranger exact vengeance on Laura's attacker, in exchange for a favor from Will in the near future. Distraught and grief-stricken, Will consents to the deal, unwittingly pulling himself into a dangerous underground vigilante operation. While continuing to protect his wife from the truth, he quickly discovers that his quest for justice could lead to frightening and deadly consequences.