11 years old Nina lives with her father in a Slavic village next to the vast and pristine Białowieża forest. She loves the forest and breaking rules. It is the 10th century and the villagers are preparing for the main Slavic holiday winter solstice, when god Swaróg the big blacksmith forges a new sun. Only this time things are different the new sun doesnt come up and the village and nature are in danger. Nina, together with Perunika, the youngest daughter of Swaróg, goes on a journey to save the world. In the movie, they travel not only through the forest but also the kingdoms of different Slavic gods, the ministry of nature and the underworld.