Kirill Vatsura investigates the murder of his friend—FSSB colonel Nefedov. It becomes known that the officer was eliminated by a powerful criminal group, whose representative plans to sail on a comfortable yacht to Cyprus. And then Kirill comes up with a completely crazy idea: he took Nefedov’s passport, got a haircut “like Nefedov,” and under his name boarded the very yacht that is heading on a cruise. The yacht sets course for an island. All around Vatsura are the nicest people. But someone among them is a dangerous man from a mafia clan.