As Po (Mick Wingert) starts beating her regularly in combat Tigress (Kari Wahlgren) becomes increasingly competitive and jealous over how far the Dragon Warrior has come during his short stay in the Jade Palace. Trying to prove her superiority in concentration, Tigress accidentally lets loose Shifu‘s (Fred Tatasciore) meditation spheres which once belonged to the evil Master Ding (Enn Reitel).
Po and Tigress set off to stop the orbs from returning to their imprisoned master in a castle on the top of Mugu Mountain. Separated while chasing the orbs around the castle and fighting off animated weapons and suits of armor, the pair of Kung Fu masters finally come face to face with the ghost of Master Ding who has been waiting centuries to release his wrath on the Valley of Peace.
Ding quickly possesses Po leaving Tigress as the only thing standing between the vengeful warrior and his revenge. Tigress uses the spirit orbs, or as Po calls them “the spinny ball thingies,” to enter her friend’s mind and release Po from Ding’s control. “The Spirit Orbs of Master Ding” works well bridging the gap between Kung Fu Panda and Kung Fu Panda 2 showcasing both Po’s improvement as a warrior and his evolving relationship with Tigress as well.