Kazami Shiro rushes to Tatsunoko Point where Destron has been sinking passing ships, in a bid to seize control of the seas. After encountering Blowfish-Apache's torpedoes, Shiro discovers slaves working in a secret weapons factory. With the help of Tachibana Tobei, Shiro is able to penetrate the Destron outpost, but they are led into a deadly trap, and sunk to the bottom of the sea! Can V3 save Tachibana and stop Destron?