As soon as Stringer sends a warning message from the planet Tranquis VII, he vanishes. Stormer quickly dispatches Bulk and Furno to the inhabited planet to find out what has happened to their teammate and seek out whatever threat has made the entire planet go radio silent. Once again, the brains have taken over almost all intelligent life on the planet. But things are different this time around. Bulk and Furno are about to discover that what looks like another invasion attempt is just covering up a much deeper and more sinister plot that will rock Hero Factory at its core.