The shop Ratman started selling dirt-cheap diamonds is thriving. When Kitaro expresses his suspicions about it, Ratman refutes him and declares he`s cutting ties with Kitaro. The truth is, Ratman has a secret partnership with the Wheel Monk. Ratman leads humans to the Wheel Monk where the Wheel Monk eats their spirits. When their spirits are consumed, the humans turn to diamonds. Selling those diamonds has made Ratman very rich and he`s indulging himself to his heart`s content. Just then, a group of humans who have lost business because of Ratman, the Diamond Syndicate, appear before him and kidnap him...!