This winter is extraordinary; Moomintroll decides to stay awake to explore the winter instead of hibernating as usually. And winters are certainly totally different than he had imagined. Strangest creatures wander amidst the snowdrifts; midwinter darkness surrounds the Moominvalley, and on top of that, an eccentric guest is soon to appear. This guest requires many measures, and is called Christmas, Hemulen tells to a surprised Moomintroll.
| Directing | Ira Carpelan | Director |
| Production | Ira Carpelan | Producer |
| Writing | Ira Carpelan | Writer |
| Production | Tom Carpelan | Producer |
| Production | Grzegorz Wacławek | Producer |
| Art | Piotr Szczepanowicz | Production Design |
| Editing | Przemysław Chruścielewski | Editor |
| Art | Ira Carpelan | Production Design |
| Writing | Piotr Szczepanowicz | Writer |
| Writing | Małgorzata Więckowicz-Żyła | Writer |
| Editing | Piotr Szczepanowicz | Editor |
| Editing | Jakub Wroński | Editor |
| Writing | Tove Jansson | Novel |
| Sound | Heikki Kossi | Foley Artist |
| Directing | Jakub Wroński | Director |
| Visual Effects | Jakub Wroński | Animation |
| Sound | Łukasz Targosz | Original Music Composer |
| Sound | Łukasz Targosz | Musician |
| Sound | Łukasz Targosz | Orchestrator |
