Fifteen-year-old Ars, due to psychological characteristics, spent most of his life at home schooling. After moving with his mother to a small town, he decides to go to school. Ars has a difficult path of socialization and testing of his moral convictions. Thanks to non-standard behavior and versatile hobbies of Ars, the initial rejection of classmates is replaced by interest and sympathy for him. Only the guy with the nickname Sissy hates Ars more and more, wanting to harm him in every possible way, and, in the end, provokes him to a duel, which will be a turning point for Ars.