The two residing ghosts are Maxie Malone, the foul-tempered former owner of the house (who has definite opinions about Alison's design plans), and Paul Harrison, a private eye who'd been working for Maxie--both died in the house on the same night. The official cause of death was suicide, but the ghosts insist they were murdered, and they need Alison to find out who killed them--or the next ghost in the guest house will be Alison herself...