Niya Moto is the only one-legged samurai kid in Japan, famous for falling flat on his face in the dirt. None of the samurai schools will teach crippled Niya, until an offer arrives from the legendary samurai warrior Ki-Yaga, sensei of the Cockroach Ryu. Niya and the other Cockroaches must defeat the fierce samurai students from the Dragon Ryu at the Samurai Trainee Games. Though they seem to be at a terrible disadvantage, it’s not long before they learn that if they stick together, there is no journey that they cannot complete, no fear that they cannot face, and no battle that they cannot win.