The rules of real ninjas

A new boy came into the class and with him a lot of problems. He doesn't talk to anyone, he swears, and he fights. His classmates are finding out that he's not going to be easy. But it's not easy for Ivos himself. Fortunately, Lenka, a social worker dedicated to martial arts, is here. Thanks to her and a book about ninjas, Ivoš will become a follower of the art of ancient warriors. And they learn that problems are not solved by running away or fighting. Can he finally stand up to them like a true ninja?