After Po is tapped to become the Spiritual Leader of the Valley of Peace, he needs to find and train a new Dragon Warrior, while a wicked sorceress plans to re-summon all the master villains whom Po has vanquished to the spirit realm.

Set in an era where superheroes are commonly known and accepted, young William Stronghold, the son of the Commander and Jetstream, tries to find a balance between being a normal teenager