Richard (Paddy Considine) has always protected his simple-minded younger brother Anthony (Toby Kebbell), but when Richard leaves the rural village where they have grown up to join the army, Anthony is taken in by Sonny (Gary Stretch), a vicious local drug dealer and his gang of thugs. Anthony becomes the gang’s pet and it amuses them to intimidate him and corrupt his innocence. Seven years later Richard returns for revenge.