 A scientist s son, named Shin, volunteers for tests. These tests turn out to be run by the "Syndicate." He is tranformed into a Kamen Rider. Knowing the "Syndicate s" plans for world domination, they must kill Shin. The CIA, trying to stop the "Syndicate" also find out Shin is a Kamen Rider. So, the CIA is also trying to kill him. Shin gets his girlfriend pregnant, and the "Syndicate" leader (of the Japan branch" kills Shin s girlfriend...