Salvador tells the story of a father who discovers that his daughter belongs to a neo-Nazi group, which he must get close to in order to try to rescue her and understand what has led her there. During a violent pre-arranged clash between radical fans of two football clubs, Salvador Aguirre (Luis Tosar), an ambulance driver, rescues his injured daughter Milena, a member of the ultra group that defends racist, violent and homophobic values, completely opposed to those he always tried to instill in her.