They've faced a crazy ghost and a madwoman, gained new friends, and sent foes to their final resting place, but Mel Hargrove and her boyfriend Becker are not sure what to do with this new situation. Every year Mel takes a reliable (and portable) ghost to do a routine bad-mojo cleaning for a lovely woman who lives in town, and all goes well until she comes out to the car and finds a new, unknown ghost sitting in her back seat. How can she be just roaming around unattached to any object, unlike any ghosts Mel knows? Is she a brand-new ghost? Where did she come from? And why is she singing a theme song from an '80s television show? Mel and Becker will have to find the answers—and the dead girl's body—before it's too late to help this lost maiden-ghost in distress.