Gina's all set to build a Giga-Engine to save Britanny, but she needs to study a model first. Joined by Brianna and Monty, she journeys to the buried continent of Pangeana for clues. Instead, they find an ancient mechanism, the source of a psionic scream that is draining Earth's ether. The monstrous machine is alive — and it gets a crush on Peebri, Brianna's rambunctious A.I. bit-bomb! If the deadliest war machine ever created on Earth wasn't scary enough, now there's a wild Peebo at its controls! Time to call... the Vaultron Force!