Ultimoose is tired of every other villain treating him like garbage. During a picnic scavenger hunt (which he wasn't invited to) he forges a plan to find the old Night Master's Amnesulet to make Grizzleflayvin forget the old Night Master. The Ultimoose will gain all of the Night Master's powers. Meanwhile, Yang wakes up and has a lousy day. Although Master Yo tells him it's not wise to walk around grumpy, Yang is too angry to listen. Yang is surprised when four floating spirit heads claiming to be ancient Woo Foo Masters tell Yang he needs to find the Amnesulet before Ultimoose does. But Yang doesn't listen to them, and Ultimoose finds the Amnesulet, gaining all the powers of the Night Master. Yang finds himself outmatched and can't beat Ultimoose's new powers. Then he discovers the Amnesulet has a reset button. Yang pushes it, and the whole day begins again. Knowing how the original events of the day play out, Yang makes the best of a bad day and gets revenge on everybody.