A married couple, detectives Marina and Maxim Sokolov, flew to the Palazzo del Mare hotel not to rest at all. They accompany journalist and socialite Anna Romanova to prevent her murder. She informed the detectives that she was ordered by the oligarch Ivannikov a couple of days before the flight, after her informant died. There are two known signs of a hired killer: he is a champion in one of the water sports and has a certain oddity, otherwise - a phobia. But the first attempt did not take place at sea. Anna almost fell off a steep cliff, leaning on the sawn railing. What else will the killer do? The outcome exceeded all the expectations of Marina and Maxim...