Keroppi gets a letter from a friend who has moved to a new town and is frightened of an abandoned house there. Keroppi and his gang travel to see him, hoping to put him at ease and help him get past his fear. While they explore the house, they come across a group of robbers and an apparition that may not be what it appears to be. The film is a theatrical release in the Sanrio Anime Festival series and mixes adventure, fantasy and supernatural elements.