Jack O’Connell plays Eric, a 19 year old convict, who gets ‘starred up’ – meaning he gets ‘promoted’ from juvenile detention to adult prison – in his case 2 years early due to his extremely violent behaviour.
There is no other backstory – we join when Eric arrives in the new prison and experience first hand how he endures and persists in this prison – the same one his father has already been in for 14 years.