Three sisters, Ira, Olya and Masha, have long dreamed of leaving Nizhny Novgorod for Moscow. Each sister has her own moving scenario, but they all secretly rely on the financial help of her mother, the owner of Tatiana's jewelry business. However, Tatiana has other plans for life: as a souvenir from her vacation, she brings a massage therapist 20 years younger than herself. And while the whole town is gossiping about a sudden romance, the daughters suspect that the new family member is an ordinary conman. They intend to open Tatiana's eyes to the truth, but does a woman who just wants to be happy need her?

"Сыщицы. Нож в спину" (The Detectives. A Stab in the Back) is a 2023 Russian detective mini-series. It is a continuation of a crime franchise that follows two contrastingly different female homicide investigators.

Friends decided to travel from the capital to the Far East by train to see the ocean. On the way, they were waiting for road adventures, stories of fellow travelers, the beauty of an immense homeland and the search for their own "I".