A successful Russian businessman is murdered in a hotel on the Turkish coast of the Black Sea. No one who was a guest at the evening when he died fits the role of killer, and besides, everyone has a solid alibi. Expert analyst Drongo is inevitably drawn into the investigation—and it is he who finds traces of the murderer. But traces are not the culprit himself; the real criminal is somewhere nearby and cold-bloodedly continues the hunt. Drongo has almost trapped the killer. But at the last moment, the criminal slips away—right in front of the entire operations team. And yet Drongo knows: their meeting is inevitable…