One day, A peaceful city is attacked by a colossal space monster. In a desperate moment, the protagonist, Kang Chan, is led by a mysterious power to summon the extinct giant Tyrannosaurus rex from 65 million years ago. With the ability to communicate with dinosaurs awakened, Kang Chan joins forces with the Tyrannosaurus rex to battle the monsters. As more powerful monsters emerge, Tyrannosaurus rex combines its strength with four other dinosaurs. They transform into mechas and combine to form a mighty weapon, creating the Supertrons. Will Kang Chan and his friends be able to fend off the monsters and protect the Earth?