Ronja learns something shocking about the robbers' way of life, while Mattis recruits a new member for the clan. Birk and Ronja meet again.

Ronja and Birk secretly spend their autumn days together in the forest, while Mattis creates obstacles for Borka. Cappa has a new plan.

Winter separates Ronja and Birk, who must remain inside the Mattis Fortress and the Borka Keep. Ronja learns why her father hates Borka.