Attorney Lisa Travina and her assistant Glafira, acting on behalf of their client Lidiya Vdovina-Osborn, who came from the United States, search for her old friend Elvira Andreevna Norkina. Five years ago, Alya lost her husband, shut herself in solitude, and then, after selling her apartment on Ostozhenka, she seemed to disappear. Beginning the investigation, the attorneys learn that Elvira Andreevna died—and at the same time Elvira Andreevna continued living. They assume that for all this time, a completely different woman had been living under Norkina’s documents. When they go to the new address of Elvira Andreevna, they find out she was murdered yesterday. The housekeeper Natasha, who told them about it, can’t believe that their mistress, her friend—her Elencha… not Elencha! She’s been knowing her for almost five years and knows everything about her! Everything? Then where is the real Norkina? Lisa and Glafira understand that they’ve gotten involved in a criminal story…