Oscar Blaketon is on his way home late one night when he sees strange lights around St. Michael's Church, but he is knocked down before he can investigate any further. Nothing appears to be missing, but a few days later a grave is desecrated and a human skull has been removed from it. Are there witches and black masses in Aidensfield? It seems so, because the farmer Mr. Follet is just wasting away as if he is bewitched and a voodoo doll and other signs of witchcraft are found on his farm. Greengrass is doing some gardening for Dorothea Cliveden, who is a queen in the cosmetic world. He surprises her one day with her face all covered in mud and learns, that people will pay a lot of money for mud intended for beauty care. Of course he cannot resist an opportunity like that.