Halloween is just around the corner, and financial planner Jillian Bradford and her horse are getting in the spirit. However, plans are disrupted when Jillian's archeologist dad receives a mysterious phone call from the director of the Spiro Mounds Archeology Center. Her father suspects his friend's concerns involve the return of ghostly blue lights people are reporting around the mounds. But, at the site, instead of finding a ghost, Jillian discovers the bludgeoned body of the director. With the help of her friends, two-legged and four, can Jillian solve the murder before she becomes the next victim?