For all the flying fists and the hero’s nightmarish predicament, the notions of redemption examined here are plenty deep. Add that to the bone-crunchingly effective technique and flawless lead performance, and you have yourself something very rare: a testosterone-driven narrative that’s about nurturing, rather than destruction. And one that achieves a bleeding-knuckled profundity.

Prayer dwells with almost swooning rapture on the bodies of young men as they mete out brutal violence on one another, and features a cast composed mostly of unknowns, impressively coached in order to deliver arresting turns onscreen.

Cole, best known for a supporting role in the TV series Peaky Blinders, gives everything to this role. It’s a physical transformation in which he convincingly plays a beaten, battered-to-a-pulp boxer who learns the rules of Muay Thai, but also a deep internal reach to deliver a complex, defiantly self-sabotaging character with depth of understanding.

At once exhausting and astonishing, this no-holds-barred adaptation of British junkie-turned-pugilist Billy Moore’s Thai prison memoir is a big, bleeding feat of extreme cinema, given elevating human dimension by rising star Joe Cole’s ferociously physical lead performance.

Jean-Stephane Sauvaire’s film is not so much the story of a fighter as it is a story that wants to fight you.