Part of the municipal park was deforested. The wild cat Mitzi, remaining orphaned with her brothers, has to leave her home destroyed by wood cutters. She reaches the Big Park Reservation (Rodnei Mountains National Park), where she finds shelter in the abandoned cottage of the forester. It’s Christmas Eve and the inhabitants of the Big Park are preparing for the celebration. Mitzi and her brothers are having trouble even here, being disturbed by the bad guys: Kit-Bandit and Max-Mask. They dress up in wolves in order to scare them away from the reservation. Their true identity is discovered by the wild cat Stripy and his friends. The scheme is foiled and to Mitzi and her brothers are offered a better life, proof that their guardian angel has not left them in trouble…