Connor Hawthorne and her lover, Laura Nez, are enjoying a quiet weekend at a women's resort in Palm Springs, but a poolside conversation soon has them neck-deep in a mystery of global ramifications. Connor and Laura travel to Yorkshire to investigate Sister Sonia, a woman rumoured to have remarkable healing powers who is also preparing her acolytes for "the end times." But Sister Sonia is toying with forces that she little understands, and her dabbling could have disastrous consequences. Then Connor's daughter, Katy, goes undercover, against her mother's wishes, to investigate Sister Sonia - and promptly disappears...