Artem, an unlucky but cheerful student, is undeservedly imprisoned for 15 days. The situation is complicated by the fact that he has a friend, a Rottweiler named Boy, who has absolutely nowhere to go. And yet Artem manages to get him adopted – a charming stranger Sasha becomes the temporary mistress of Boy. Returning two weeks later to pick up the dog, Artem suddenly notices that Sasha is blind. He decides to leave the girl a guide dog and, unnoticed by her, to settle in her apartment….