Business is booming at Zombillenium thanks to demonic reforms by Behemoth, the park’s CEO, who has just decided to wager his property in a very special competition: a witches’ Sabbath! Meanwhile, Gretchen, Aurelian, and von Bloodt have set up an underground network to help the damned escape the nine circles of Hell. This dangerous and top-secret operation is not appreciated by the park’s board of directors, who call upon the services of a formidable enchantress to remedy the situation. Naturally, the witch in question will become Gretchen’s arch rival. The ensuing fight promises to be epic, both high above and below ground!