The Changelings are undone; but the last words of their race are yet to be read, and Celestia is about to learn what it feels like to have the blood of a race on one's hooves.

The warrior Samurai Jack is locked in a death battle with his people's mortal enemy, the dark wizard Aku. However, before Jack can vanquish this scourge once and for all, Aku tears the fabric of reality and sends Jack into the void.

The People's Champion is in Equestria. Hijinks ensue.