Tommy Conlon returns to his hometown of Pittsburgh and enlists his father, a recovered alcoholic and his former coach, to train him for an MMA tournament awarding the biggest purse in the history of the sport. Meanwhile, his estranged brother, Brendan, a former MMA fighter unable to make ends meet as a public school teacher, returns to the amateur ring to provide for his family after being suspended from his day job. When Brendan's unlikely rise as an underdog sets him on a collision course with Tommy, the two brothers must finally confront the forces that tore them apart, all the while waging the most intense, winner-takes-all battle of their lives.