Anna Sterkhova came to the seaside to relax after a difficult divorce and the difficult everyday life of a lieutenant colonel of the capital police, but crimes found her in the quiet town of Pridivnoye. First, someone broke into her room and left an eloquent message on the bed - a grave mound of sand, then Anna saved a crazy girl who decided to commit suicide, and then Sterkhova, instead of a beach holiday, started investigating a crime. Fifteen years ago in Pridivnoye, local beauty queen Katerina Karatanova disappeared under mysterious circumstances. She was declared drowned, the case was archived, but Anna managed to bring to light new circumstances of that sensational story...