Tempers are flaring around Zombillenium, the monster amusement park run by monsters. When one hires only the dead (or witches!) in a region where unemployment is in the double digits, one must expect some friction. But things get particularly ugly when the park's security is breached from two sides: activists and a very strange visitor, mom to two peculiar sons the head of the park seems to remember from somewhere... Gretchen and Aurelian do their best to help save a precarious explosive situation.