Neville: "I'm going to tell you something, all right? This is no young offenders turn out."
An explosively violent 19-year-old offender (Jack O’Connell) is transferred to adult prison where he finally meets his match in a jail-hardened lifer - his father (Ben Mendelsohn).
Rupert Friend is the counsellor who tries to reconcile the two, but his work is cut out under the uncaring regime of a pitiless governor (Sam Spruell).
Screenwriter Jonathan Asser's experience of working with violent gang members allied to compelling performances from O'Connell and Mendelsohn makes this a cut above most tales from the British big house.