When his brother is shot and his niece kidnapped, a former MMA champion turned police detective is forced to go back into the ring for one last fight in order to rescue the girl and appease the criminals who have harmed his family. 　　当他的兄弟被枪杀并且他的侄女被绑架时，一名前MMA冠军转为警察被迫回到赛场进行最后一次战斗，以便拯救女孩并安抚伤害他家人的罪犯。