The main character of the story is investigator Ulyana Sokolova. She leaves the capital city and moves to the provincial town of Andreysk, where crime is thriving. In addition to her regular cases, Sokolova is also investigating the mysterious death of her predecessor, investigator Ivashkina. In this town, Ulya encounters a man named Alexander, whom she loved in her youth. Now he has also become an investigator and settled in St. Petersburg. Ulyana is immersed in memories of her first love.