
Cronos Corporation has been experimenting with bioweapons. They are concentrating on three Guyver Units, living suits of armor which bond with a subject and give the wearer abilities beyond human capabilities.
A secret organization named Cronos is trying to recover the three Guyver units. Sho and Tetsuro have another meeting with Cronos troops, Guyver reappears and performs the Mega-Smasher attack for the first time.