Even though he has only one leg, Niya Moto is studying to be a samurai, and his five fellow-students are similarly burdened, but sensei Ki-Yaga, an ancient but legendary warrior, teaches them not only physical skills but mental and spiritual ones as well, so that they are well-equipped to face their most formidable opponents at the annual Samurai Games.

Sensei Ki-yaga leads the disabled samurai-in-training of the Cockroach Ryu across the Sea of Japan to China, where they study the ways of the Shaolin monks before facing Qing-Shen, a skilled soldier seeking revenge against his former teacher, the Sensei.