Directed by Antoine Fuqua and starring Denzel Washington, Chloë Grace Moretz and Marton Csokas, The Equalizer follows former covert operative Robert McCall as he comes out of retirement after a young woman falls under the control of violent Russian gangsters. Using his highly trained skills, McCall wages a calculated campaign against the criminal organization and rediscovers his sense of justice.

Från IMDB:
A man who believes he has put his mysterious past behind him cannot stand idly by when he meets a young girl under the control of ultra-violent Russian gangsters.