[Edit]A test type Zoanoid, disguised as a normal man, escapes from an organization called the Chronos Corporation with a bag containing three items called the Guyver Units. Chronos soldiers attempt to recover the units from the test-type but the test-type was discovered with a grenade in his possession and used it to kill himself. The resulting explosion scattered the Guyver Units around the area.
Meanwhile, two young high school students, Sho Fukamachi and Tetsuro Segawa come across one of the lost Guyver Units. Curious as to what the unit is, Sho accidentally activates the unit which then merges with him, becoming "Guyver I." Now Sho must fight for his life and those that are close to him against Zoanoids sent by the evil Chronos Corporation that are in pursuit of the stolen Guyver Units.
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