After Rex returns, he and the rest of the D-Team have headed off to a paleontologist-to-be academy, called Paleocademy. Soon, the trio learn that their teacher is, in fact, Reese! As Reese bores their heads off with her monotonic lectures, they decide to help Rex recapture the lost dinosaurs, which are rampaging across Earth! With the help of old and new friends, the D-Team will face off against their new enemies, the Night Stars, and save their home once again!