The film follows the story of One (played by Ryan Reynolds), a billionaire philanthropist who fakes his own death to escape his luxurious life and become a vigilante. He joins a team of activists, including Green (Mélanie Laurent), a French doctor; Farhad (Manuel Garcia-Rulfo), an Iranian Kurd; Turk (Daniel Henney), a former US Army Ranger; and Quail (Ben Hardy), a young and talented engineer.