Duke and 地下Yan, two long time rivals, are competing in the world’s most dangerous underground fighting tournament, where powerful crimelords can gamble and influence who they fight, the terrain they fight on and what weapons will be used. In this high-stakes bloodsport where one wrong move can mean certain death, they must decide whether to play by the rules or to cast their honor aside and team up against the dark syndicate running the tournament and bring the entire system down.