The peace and prosperity of Celestia's and Luna's rule of Equestria is turned upside down and all but ripped apart when the ruthless Zerg Swarm invades, overwhelming all in their path. It quickly becomes apparent that the princesses and even the Elements of Harmony are powerless against the Zerg. But with the arrival of the Terrans and the Protoss, can Equestria be saved with their help? Or will the Protoss' distrustfulness and the Terran's greed get the better of them, and doom all of Equestria and the rest of the world to a fate worse than death?