To overcome his timidity, Wall-nut volunteers himself to be the test subject of Torchwood's teleportation machine. The machine sends Wall-nut back to the Triassic. In the Triassic primitive forest, Wall-nut scares off the Coelophysis and fights with the Herrerasaurus to rescue Alex and Eoraptor and his clan. He is regarded as ""the number one warrior in the world"". 

Thus, he feels good about being a hero and is reluctant to return home. But, the Herrerasaurus takes revenge by kidnapping his friends Peashooter and Bonk Choy as well as the whole clan of Eoraptor.

What will Wall-nut do to save them?