The brothers Maxim and Andriy Kireyev, despite their difficult relationship, have to work in one police department to understand the mysterious death of their joint father. Andriy is Kireyev's son from his first marriage, a reliable and experienced police captain who has hated his father for years because he left them with his mother. Maxim is Kireyev's second child, an infantile young boy who is enlisted in his brother's department to prove his involvement in the murder of his father and to gain access to the case.

The frivolous, accustomed to receiving everything and at once Maxim and the responsible, prudent Andrew will start an investigation that will reveal not only the secrets of the past to them, but also the unexpected truth – they have much more in common than they think.