With evil Munarian Emperor Rorroti on the brink of victory, the only thing that can stop him lies hidden away, to be wielded by one who shares its inventor's bloodline. It's up to Rain, of all people, to save the world!Forging an uneasy alliance with Sean's father and his alien henchman, Lakusa, can our tetchy trio trust each other? Facing the prospect of revolt or annihilation, what's Director Emma's next move? Can the Exobot Academy come to the aid of the Elite 8 in time? The Earth's fate hangs in the balance as our heroes head into THE DRAGON'S TRIANGLE!