Alexey Senin, a brilliant and world famous young pianist, lives in a quiet isolated reality created and managed by his mother and aunt. This is the only place where he feels safe and content. Alexey would spend his whole life in this "music capsule" if it were not for one unexpected meeting. At a party organized by his employer, the powerful businessman Vladimir, Alexey meets Sasha, the boss's daughter. From the first moment of meeting her, Sasha gives her something that she has always missed in her suffocating family circle. Together, the pianist and the girl are ready to defend their inner world against everything and everyone. But they have a problem: Sasha is only 11 years old...