A stark, brutal, yet tender prison drama starring Jack O'Connell as a
violent inmate sent to the same lock - up as his
jailbird father (Ben Mendelsohn), the film's shot through with a raw energy and authenticity that's closer to «A Prophet» than to most other British films in the genre, with Mackenzie making the movie feel like he's bottled up a hurricane of tension, which at any second could kick through the screen at you and hit you with a sock full of snooker balls.