A murder on Halloween? Who would have thought that?Halloween has arrived and so has everyone's favorite ghost: Rachel. Invited to a Halloween party, Mel and her friends hope to enjoy a night of fun. The party soon turns sour when a man turns up dead during a murder mystery game.While Detective Shorts is busy questioning everyone who attended the party, Mel and her friends start their own investigation. Soon they find themselves digging into secrets best forgotten—the hostess' mysterious sister and a lost will—and an underground tunnel that the murderer used to sneak into the mansion. Will Mel be able to solve this case before the night ends and the killer disappears?