Mazie, confident from proving that her purification method works during her fight with Chip, starts training with town guardian, Scarlet Rosemary. They now must deal with a giant emotion monster that’s threatening the town of Monstro City. When Scarlet doesn’t allow Mazie to do her purification song for the sake of time, Mazie will knock her mentor out and take to the clouds to see if she can get to the root of what kind of big emotions this giant is feeling.