 Two Chinese clans compete in 10 rounds of combat using (in most cases) a vast assortment of weapons. When one clan loses heavily they employ the services of Japanese ninjas. The ninjas challenge the first clans  best fighters to face five sets of element ninjas. When the Japanese ninjas massacre the clan they follow up by invading their head quarters and wiping out the remnants of the clan. One clan member gets away and learns the art of the ninjas. He then heads back to challenge the ninjas who have now disposed of their employers. The lone clansman and his three new sworn brothers must then face the unstoppable ninjas.