Karag looks like an ordinary schoolboy. But behind the unremarkable appearance hides someone unusual. Half human, half cougar - that's who this mystery guy really is. Living among people like him is not always easy. But, fortunately, one day Karag has a chance to enter a unique educational institution. "Crystal" is a school where teenagers who know how to turn into animals study. Maybe Karag will finally manage to make friends? However, some here are already following him. Who is that? And why is he doing it? And does this mean that Karaga will face very dangerous tests?