Cassie hosts a guest with a surprising secret. Sam's visiting friend needs medical expertise but the cure may lie in Cassie's intuition. Grace interns for Martha at City Hall and faces competition from a fellow intern. Martha prepares the first episode of her show, and Stephanie considers her romantic options.
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.