While Hongo and the others are training intensely with their sights set on winning the All Japan Motorcycle Championship, Rhinogang is dispatched from Shocker's Africa division.
Doctor Reaper returns to Shocker's Japan branch of Katsugawa Island along with Catfishgiller who he remodeled from an electric catfish.
In place of Ichimonji who heads to South America to pursue Doctor Reaper, Hongo once again comes to protect Japan.
Doctor Ootaguro succeeds in developing the "Alpha Liquid," a life revitalizing drug that can revive a dead organism.
From the only surviving earthworm of the Bikini Islands atomic bomb experiments Shocker creates Earthworm Man.
