Irish travellers live in a closed community. What we think we know about them is based on hearsay, rumour and stereotype. But not any more. Knuckle is the true story of James Quinn McDonagh - clan head and champion bare-knuckle fighter. It's a journey from his grandfather's horse-drawn caravan at the side of the road to the country lanes of Ireland where he stood, fists bloodied and bandaged, fighting a clan war that he never asked for. Two men, two neutral referees, a country lane. No gloves, no biting, no rests. The last man standing wins, takes home the money, and more importantly, the bragging rights. Caught in a brutal cycle of violence that has left men dead, houses burned and lives destroyed, James tells a story that opens up a hidden world - revealing why history repeats itself, and why he can never go home...