Lawyer Agata Rud did not want to communicate with the quarrelsome old woman who came to the police to report the disappearance of her sister! Only a personal request from a familiar investigator to rid him of an intrusive visitor forced Agatha to get involved in this case. It turned out that the missing Nadezhda Sergeevna owned a rare ring that collectors were literally chasing. She went to meet one of them, after which she disappeared without a trace... However, personal experiences made Agatha forget about work for a while: Boris Ustinovich, an old friend and colleague at the law office, proposed to her. Agata had already decided to agree when Boris suddenly met singer Zhenya Arzamasova! By a strange coincidence, the niece of the same man who had been hunting for the ring for a long time...