A fortuneteller prophesizes that whoever marries the beautiful Ukio will become the ruler of the world. Naturally, this makes her very popular with those vying for power, particularly the insatiably greedy Lord Donjo. Only the ninja Jotaro can stop Donjo's plan, but to do so, he must first battle the deadly team of "Devil Monks" serving the lord. Will Jotaro succeed in his mission? And if so, will Ukio marry him, thus making him the ruler of the world?