Rad, Carlos and Alexis uncover what really happened to the lost race of Mini-cons - but can they help the Autobots reach them before the Decepticons do?

Rad, Carlos and Alexis uncover what really happened to the lost race of Mini-cons - but can they help the Autobots reach them before the Decepticons do? Rad, Carlos, Alexis and the Autobots encounter danger at every turn as they search for the powerful Mini-cons that have been in hibernation for millions of years. If they're to succeed, they must battle the evil Decepticons - in an ancient city at the bottom of the ocean, and on an island with a volcano threatening to erupt at any moment!