Cassie welcomes a popular fantasy author and her editor to Grey House. Before long, Cassie inspires her to hold the launch party for her latest book right there in Middleton, which shares mysterious and surprising similarities with her stories. Work begins to transform Middleton into the book's Halloween-inspired setting of Tarynsville but when the event is threatened, Cassie must conjure up a way to save the day - all the while helping the author and editor find a long-simmering love.