Lily breaks into Blackwood Manor and mistakes the monstrous manor-owners Arthur and Eleanor for her birth parents. Bound by rules set by an angel-like eyeball monster, the monster couple have to act as her family and cannot harm her. Lily has a special vision that turns horrifying monsters into cute animals. As they get along, their long-buried parental love awakens, and they find Lily is their biological daughter who survived a car crash. At the fatal seventh-day banquet in the manor, they rebel against the cruel rules and risk everything to send Lily to safety. Finally they regain their humanity, return to the human world and reunite happily with Lily.
