After the defeat of the Book of Monsters, everyone thought life was back to normal for the better. But when Clay and Jestro start having terrible nightmares, they realise that destroying the one thing that held the soul of Monstrox may have unleashed something dangerous.

When young knight Clay Moorington finds himself trapped in a castle with a cursed Jester and his group of monsters, he has trouble adjusting to the situation. But as Clay begins to get through to the Jester, he finds out there is more to him then what lays on the outside.