Zany Aunt Rowe is keeping Sabrina from working on her latest novel; Rowe has signed up for the upcoming Texas Hill Rodeo, even though she has no experience with lassos or even horseback riding. But before Sabrina can do anything about it, a bigger problem arises. A local business owner is found dead, right after a black cat was seen in her office. While the townsfolk think the bad luck cat has struck again, Sabrina suspects there might be something more murderous afoot. With a twisted killer on the loose, she'll have to round up clues quickly.