The Burul family is forced to leave Kharkiv dear to their hearts and move to the cozy Bukovina town of Veliky pup. Here, among the majestic mountains and places shrouded in Legends, the Twins Yarina and Yarik stumble upon a mysterious black cat. This chance encounter turns children's lives upside down and encourages them to plunge into dizzying adventures. Fixing a magic elevator, traveling between the worlds of humans and cats, exposing the sinister plans of smugglers, and then the project at school must be done on time... will the little icicles cope with such an invasion of cases? Read and find out!