The famous top model Arina Vinokuroff was going to end her career and get married, but her lover, the Russian oligarch Maksyuta, was killed during their date on a yacht. Arina was accused of the crime, because she was found with a knife in her hand. She is innocent, but there is no one to confirm this... Maksyuta's daughter Taechka and a private detective hired by the oligarch shortly before his death unexpectedly came to her aid - it turns out he had received threatening letters. Someone promised to punish Maksyuta for what he did thirty years ago, like the rest of the members of the Staronikola Union. But what kind of union is this and what unsightly secret unites its members?