For Drongo, the famous expert analyst, the upcoming sea trip promised to be unforgettable—French Polynesia, exotic sights, a huge comfortable ocean liner, dazzling in its splendor. The voyage truly turned out unforgettable—but for other reasons: instead of finally relaxing and enjoying the vacation, Drongo had to unravel yet another murder. On board the ship, in one of the cabins, the dead body of a Russian tourist was found—Ignat Seversov, one of the owners of the company “Yakut Diamonds.” The circle of suspects turned out to be unexpectedly wide—not only travelers from the Russian group knew the murdered man, but also tourists from the Baltics. And then, just to further confuse the investigation, the killer throws the key to Seversov’s cabin into Drongo’s own suit pocket…