In the forest there is great turmoil because no one can open the school door. What is the magic key and why did the teacher's smile disappear?

Mayor Alkibiades Loup orders investigations and all the animals are willing to help him. They must find and bring back Kalliope Fox's lost smile. Otherwise, the school will remain closed.

A humorous story in a fairytale atmosphere, aimed at integrating young students into school life, understanding how the school operates, and improving both their social behavior and emotional state.