Po goes on a new quest with his adopted duck father Mr. Ping and the red panda Master Shifu — to bring the Liquid of Ultimate Power to the Palace for the Emperor. The mission is hijacked by the villainous Kang Wolf who wields the stolen Ming Hammer, a relic so powerful that it knocks foes into the spirit world. Po and his sidekicks battle Kang in this ethereal world, along raging rivers and into the Emperor's Palace.