Doctors Kazamatsuri and Onizuka are geneticists, researching cures for diseases such as AIDS and cancer by performing experiments to strengthen the human body. The test subject, Shin Kazamatsuri, races motorcycles and is Doctor Kazamatsuri's son. Unknown to the doctors, their operation is funded by a syndicate group who plans to use the research to have the bodies of men strengthened for their own gain. The Doctors were previously unsuccessful with experiments on cyborg soldiers. However, they did not count on Onizuka's own secret ambitions: he wants to create a new species of soldiers by fusing the DNA of a grasshopper and test subjects to start a new civilization and be their God. He may have tested it on himself, but seems to be having greater success with Shin.