Long ago in the time of dinosaurs, the Deboth Army invades Earth to the point of the extinction of the dinosaurs but they were defeated by Wise God Torin and the Zyudenryu during the first invasion. In the present day, the Deboth Army resurface as they resume their invasion. To counter the revived threat, Torin selects five brave individuals who must defeat their respective Zyudenryu first in order to acquire their powers to become the "People of the Strong Dragons", the Kyoryugers.