The aliens have once again invaded the Earth but this time, with Dinosaur troops and its king. However, they retreat as Dino King is injured but drop the Dino King's key on their way back, losing him. Yan, a young boy in China, picks up the key, summons the Dino King, treats his wounds, and names him Deeno. The aliens return and capture Deeno in another attempt to take over the planet Earth!
