Celeste Sweetwater, a new kind of demon, joins Hunter and Alana and the rest of the demon guardians in a fight to find a new kind of portal device that can summon several demons at once. But not only that, another Matusa has been unleashed on the unsuspecting human world and the demon guardians must stop him before he wreaks much more havoc.

But this time, the police are involved, paranormal investigators pounce on the area, and the whole mess seems to be spiraling out of the demon guardians' control.