A gritty MMA fighter is forced into a twisted, underground gambling ring in which he must fight to the death with other MMA fighters in order to save his wife from certain death at the hands of a maniacal crime boss. In a desperate race against time, he is forced into a series of increasingly violent life and death matches while simultaneously piecing together the puzzle which leads him to uncover the identity of the promoter and the ultimate showdown, in which there can only be one .