Cassie's being honored by her alma mater and visits with Grace, who's considering enrolling. Grace bonds with her weekend host, while Cassie reconnects with her college friend. Needing a break from Donovan, Abigail joins. At Grey House, Sam tries to channel Cassie while helping his father-son guests communicate better.
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.