An adaptation of the book by Jerzy Niemczuk. The protagonists are strange but friendly creatures inhabiting the heart of the forest - Tatun, Mamuna, their child Sonek and grandfather Lesavik. The grandfather's inventions - including a kite, a znikolina and a conusola - save the children trapped in the mighty Marbat castle.

A unit of the People's Army celebrates the moment of liberation of the country. They remember the times of occupation, the actions they took, and their fallen colleagues.