Madikken goes to the Walborg fair celebration in her new sandals, even if her mother Kajsa are saying no to it. And she meets her schoolmate Mia, who throws away one of the sandals.
When Madicken is discovered after school with lice in his hair, which probably come from Lus-Mia, mother Kajsa buys home sabadilla lice for lice removal, to which Mia and Mattis are also invited.
Madicken can not tolerate injustice. Then her heart becomes black. Like when Alva are crying at the big ball. And for Abbe is Madicken's big heart pounding. And she give him everything. As the seat next to the pilot at the air show.