It's Halloween, and seventeen-year-old MaryAnn is excited about her town's annual celebration. The season assumes an ominous tone when MaryAnn is led to the body of her neighbor, Mr. Carlson, by the eerie howls of the big orange stray who frequents his backyard. Weeks earlier, when her eyes had met the cat's spooky yellow stare, MaryAnn had known something out of the ordinary was going to happen, but she never expected death. The deceased Mr. Carlson soon appears to MaryAnn in a dream, insisting she find his murderer, and she reluctantly agrees. With the help of her close-knit group of friends, the big orange cat, and an adorable Corgi named Trixie, MaryAnn discovers her own psychic talents while unraveling a Halloween mystery that stretches back to her own mother's death.