On the Valiant's maiden voyage in space, it encounters a swarm of brains drifting quietly through space. Little does the crew know these strange creatures have the ability to control the minds of anyone they touch. The ship is quickly taken over by the hostile life-forms, and the Valiant begins rocketing through space on a collision course with one target: the Hero Factory in Makuhero City.
It's up to Stormer, Rocka, and Breez to stop the ship, and prevent the destruction of their home world. If they fail, then it's up to the rest of the Hero Factory team to destroy the spaceship--at any cost.