In this follow-up novel to Switching Gears, 12-year-old Kevin Bowman is now working with the Autobots to fight the evil Decepticons and search for his missing brother. Kevin is starting to lose hope until he gets help from the most unexpected person-his nemesis, Douglas. Douglas informs the team of a secret cave of ancient Cybertronian weapons located at Battle Mountain, Nevada. Kevin and Gears believe the cave might have clues to the disappearance of Kevin's brother and other missing soldiers. Will the team find what they are looking for or has Douglas set a trap for them at Battle Mountain?