 Yoko s cat Yuki hasn t shown up for diner and this really concerns her as the cat never misses a meal. She starts looking, asking neighbors if they have seen the animal. Then, one boy mentions seeing Yuki around the  Haunted House , further up in the city. It s a favorite playground of the boy s group of friends. Yoko soon finds out this isn t an ordinary place. Objects are disappearing, feathers turns into birds and gravity seems to be absent. But Yoko soon finds out the existence of the place is also known by a group of rather reckless people.