Ryu (Akira Kobayashi) sets foot on the Yokohama port with a suitcase filled with 300 thousand dollars. He was sent by a jewellery company in Hong Kong to retrieve a certain diamond that was stolen from them. The “Himalayan Star” is worth a couple hundred million yen and unbeknown to Ryu, it now lays in the hands of Aizu (Jo Shishido), the infamous ”Pirate of the Tokyo Bay.”