Kai Hyuga / Sharivan uncovers the existence of a spy from the Neo Madou organization. In addition to that Kai's friend, Seigi, becomes the new Space Sheriff Estevan. They must find the spy and stop a drug ring from shipping a pain suppressing narcotic called Hyper-M on Earth. But the new Space Sheriff must learn to trust his instincts and that not all is as it seems...

The Iron Cross Army are sabotaging oil-tankers with the help of their monster, the Sea-Devil, a semi-mechanical anthropomorphic swordfish with an ability to shoot torpedoes from its mouth. Spiderman employs the help of the interpol agent Juzo Mamiya to help him stop the Iron Cross Army.