Within the course of a night, Woody Harrelson finds himself in a misadventure in London that winds him up in prison.

Eric Love (O'Connell) is a 19 year old teenager who is so violent he has been 'Starred Up' (Moved to Adult prison) where he finds his father Neville (Mendelsohn) who Eric hasn't seen since he was 5 (since he was put into care). Neville tries to get Eric to settle down, so Eric gets a chance to go through therapy with Oliver (Friend).

Best friends Will McKenzie, Simon Cooper, Jay Cartwright and Neil Sutherland - who are not among the social outcasts, but also not cool enough to hang out with the cool kids who they aspire to be - have just graduated from their suburban London high school. Simon has finally been able to get Carli D'Amato, who he has been in love with since they were children, to be his girlfriend. Largely because they will be going away to different schools in the fall, Carli breaks up with him. To get Simon's...