In a world where supervillains are commonplace, two estranged childhood best friends reunite after one devises a treatment that gives them powers to protect their city.

Robert McCall, who serves an unflinching justice for the exploited and oppressed, embarks on a relentless, globe-trotting quest for vengeance when a long-time girl friend is murdered.

McCall believes he has put his mysterious past behind him and dedicated himself to beginning a new, quiet life. But when he meets Teri, a young girl under the control…