A Thai boxing enthusiast finds himself on the wrong side of the law when a street fight ends in the accidental death of his opponent. After a stretch in prison, Angelo (Clovis Cornillac, A VERY LONG ENGAGEMENT) returns to society a shadow of this former self. He meets and falls in love with a waitress who, it later transpires, is being paid to go out with him. Upon learning the painful truth, Angelo vows never to allow himself to get hurt again. He is drawn back into the illegal world of underground free fighting, but this time, he will stop at nothing to become the ultimate fighting machineThe Scorpion.