Vòng tròn đau khổ - Circle of Pain (2010)

Following an in-ring accident, Dalton Hunt retired from the world of mixed martial arts at the top of his game. Unable to outrun his guilt, he lost his family, his title, and his way. But when a crooked promoter lures him back into a fight against the current undefeated champ, Patrick "The Brick" Wahle, Dalton must enlist the aid of an enigmatic trainer to turn him back into a warrior so he can stand tall and do battle once again.