4 Yarborough Drive looked like any other late 19th century English townhouse. Alice Lorrimer feels safe and welcomed there, but soon discovers all is not as it appears to be. One of her housemates flees the house in terror. Another disappears and never returns. Then there are the sounds of a woman wailing, strange shadows and mists, and the appearance of the long-dead Josiah Underwood who founded a coven there many years earlier. The house is infested with his evil, and Alice and her friends are about to discover who The Thirteen really are.