When danger is near, best friends Gary, Ruby, Bel and Morris become superheroes. The Chimp can swing from the rooftops, KangaRuby has a magical pocket, Bel's voice can shatter glass and Slug Boy . . . well he's a bit sluggy. The gang are thrilled to win a school trip to Transyldovia. But amid all the skiing and snow-filled fun, something strange is afoot. It starts with a runaway toilet and rapidly snowballs into a wild and dangerous adventure. . . Flying pigs! Vampires! Beetroot! Will the Fish Fingers survive their most chilling ordeal yet?