Gigano Dragon returns to challenge Dino Tyranno, his old enemy. On Earth, Kaito is saved from the school bully by his friend Rena and reveals to her the Dino Knights. In the Dinotarium, fossilized daggers are found, which are really the power source to the Dino Knights. The Dragozaurs wish to control them, and the Dino Knights must battle to get them back.