A desperate young man is forced into the dangerous world of underground combat to win enough money to save his sick mother. Faced with these violent competitors, he discovered his strength.(美国斗士)导演是谁?美国斗士中文预告短片美国斗士:剧情大纲美国斗士免费下载美国斗士:动作类型概括(美国斗士)在哪上映?