R

The Ur of the title means the youthful protagonist, Rune, fearlessly performed by Pilou Asbæk. Jailed for violent assault, he's a cocky, good-searching youthful guy put into the hardcore ward, where his survival is dependent on rapidly learning the prison's parallel realm of rules, recognition, and obligations. R also means Rachid, a youthful Muslim prisoner who becomes Rune's friend and accomplice, repel the rigid racial stratifications one of the inmates.