After having a dream about the Secret Dinosaur Therizinosaurus, Dr. Z predicts where it will activate and sends Ursula, Zander, and Ed to Japan to capture it. As the D-Team searches for the perfect fossil for their school project, the same Therizinosaurus appears. Ursula, Zander and Ed summon Terry, Spiny and Tank but get defeated all at once. After that, Dr. Z and Seth arrive to claim it. However, Dr. Z's attempt to get Therizinosaurus begins to fail as soon as it starts. Max and Rex claim it and after the battle, the D-Team finds the perfect fossil - a Therizinosaurus fossil.