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In Gnästa, someone has set fire to the school gym. Eleni and her friends conduct their own investigation to find out who is responsible for this fire and the others. At the same time, the confrontation between the girls and boys in the class re-emerges, as they consider them too annoying and their fight for equality just another "prank". Will Elena, Tilde, and Yasmin succeed in exposing the arsonist and, together with the other girls, achieve their demands - read the book.