Mortimer and the monsters must figure out how to send Oscar back to his own time, but the only person that can help is the foe of monsters everywhere: a witch. Will they all be able to work together to get Oscar back to Hedgehog?

Frustrated that he doesn't know his magical identity, Oliver convinces Susie to tell him by means of nonviolent protest. Not wanting anyone in her house, Susie takes Oliver on a series of errands to help him figure it out.

Susie sends Alexa to the Fjords to train as a giant, but her small size causes her to lag behind. Will Alexa be able to fake it until she makes it – or are these boots too enormous to fill?