Cassie and Sam's plans to steal away to Chicago for the weekend go awry when he has to stay behind for work. Instead, Cassie takes her book club friends so they can all recharge. Joy questions her decision to partner with Donna again as they work on Martha's renovation. Abigail bristles at Donna's style but their may be another reason she hasn't taken to her. Abigail and Joy join Cassie at the memorial luncheon for her mentor Olympia and make a surprising discovery that could bring them closer to breaking the Merriwick-Davenport curse.
A mysterious, darkly beautiful woman named Cassandra Nightingale moves into an old, abandoned house which is reputed to be haunted by its original owner, "The Grey Lady". The small community is divided in their opinion of her: Some want her to stay (especially widowed police chief Jake Russell and his two children), while others want her to leave. Through the course of the story, seemingly magical things happen, and the community attributes these occurrences to her. Everyone begins to wonder if she is really a witch.