An epic 12-year journey into in the world of an Irish Traveller community, KNUCKLE takes us inside their brutal, secretive and exhilarating bare-knuckle fighting lives. Chronicling a history of violent feuding between rival families, the story focuses on two brothers as they fight for their reputations and the honour of their family name. Brutal, yet captivating and ultimately moving, this unforgettable documentary offers an exclusive insight into the world of Irish Travellers and the lengths they will go to protect their family name.