One chilly night, Howl has a equally chilling encounter with the Witch of The Waste. But it turns out she is not alone...a small mouse like brunette catches his eye. The only problem is...she is binded to the rotten Witch and is simply a mindless servant. Can he save this poor girl before she finally loses herself?

Mabel has the brilliant idea of Dipper and her switching 'lives' for a day. Meanwhile Dipper picks up a peculiar mirror for the antique shop... where is all this mess headed?

Aangs away, there's a psycho fire bender on the loose, and the only people available to fight aren't quite well enough for this. After having two children, Katara has to be out on the battlefield, along with Toph and her brother.