Synopsis: The Book of Shadows (a Team Girl adventure)

Eile and Sunny are hired by a wealthy matron to go to Ireland to retrieve an occult book, the Book of Shadows. When they arrive, they find the book dealer dead and his store ransacked. Medb appears and they flee from the police. They go back to their room at a pub to retrieve their traveler's cheque cards, but are surprised by a female police inspector, Chromáin. They get away and hide out in a ruined church. After dark, Medb summons the ghouls from a cemetery. They confirm a sorceress forced them to kill the bookseller and steal the book, but they already passed it to a contact. They describe him. Medb then takes the girls back to the ruins where they spend the night.

The next morning, they steal some bicycles and go to meet a leader of an IRA splinter group to sell the cards for cash. The girls recognize the leader as the contact described by the ghouls. When Medb confronts him about it, he denies it, but then he tries to kill Medb and the girls. Medb beats off his men as the girls snatch the money and some papers. On the road, they discover that the papers Sunny took are brochures for Aillwee Cave. Medb realizes that the IRA leader will take the book there, because there is a ritual in the book that will allow a sorcerer to summon Fomorians from the cave. With the Fomorians on their side, the IRA would be unstoppable.

They head north towards the cave, stopping only to rest and eat. In early evening they are attacked by winged monstrosities that try to kidnap the girls, but Medb beats them off. The next day they are nearly caught by the police, so Medb contacts Chromáin and arranges a meeting. She makes a deal to lead her to the real murderer and his/her accomplices.

Chromáin gets them to Aillwee and Medb leads them down into its depths. In a gallery closed to the public, they find the IRA leader trying to raise the Fomorians. His men try to prevent the women from disrupting the ceremony, but at a pre-arranged signal, the ghouls appear and subdue the men. Chromáin arrests the IRA leader, but then the matron who hired the girls appears and the ghouls kill the IRA people and take the women captive. They are then taken through ghoul tunnels to an underground temple where the matron intends to raise Cromcrua, the last and most powerful of the Fomorian kings. Medb is to be sacrificed as part of the ritual, both because of her personal power and to placate him, since he and she were enemies in ancient Ireland. The ghouls will be given Chromáin and the girls as their reward. She begins the ceremony, but something goes wrong. A gate is opened and a tentacle monstrosity begins to emerge. The matron is seized by it and devoured. The ghouls present Medb, but as it reaches for her, more ghouls enter the chamber. However, they attack the other ghouls. As the ghouls fight amongst themselves, Medb takes the book and reads off a counter-spell as Chromáin and the girls fight off tentacles. The spell works and the gate closes.

The rescuing ghouls are victorious and they lead the women back to the surface. Their leader explains to Chromáin and the girls that the ghouls who had captured them were members of the Radical faction, that worship Nyarlathotep. She and her warren are Traditionalists, who worship Mordiggian. Traditionalists eat corpses, though they are not adverse to fresh meat when the opportunity arises, and they are tolerant of humans, since they themselves were once human. The Radicals, on the other hand, see all humans dead or alive as prey, except for other worshipers of Nyarlathotep. Ordinarily they would not have interfered, but their association with Medb as the original Morrígan and their desire not to see mankind destroyed forced their hand. She gives Medb the Book of Shadows to keep safe. Medb asks her to initiate the girls as friends of her warren. She explains to them that such a ritual normally requires the suppliants to undergo sexual relations with the members of the warren, however, there have been exceptions granted under special circumstances. She will have to confer with the priests of Mordiggian to see if the girls can be granted this dispensation.

The girls and Medb return with Chromáin to Kilfenora. Based on their statements and her report, all charges against them are dropped. The girls and Medb then return to Lahinch and spend a week on holiday at Medb's expense. On their last night, Medb takes the girls down into a nearby ghoul warren. There they are initiated as friends of the ghouls in a special ceremony with Medb as their sponsor. They are given ankhs so that they can show any ghoul they meet that they are friends and trustworthy. They are not required to engage in sex or consume corpse flesh, but afterwards they are invited to the feast and orgy. The ghouls take no offense when they decline.