Among the trio of inseparable friends, Shura Krushinskaya, a chemistry teacher at an evening school, was the most unlucky and unsettled. Olga and her husband are well-known financiers in the city. Valeria has been the darling of fate since childhood, and over the years, the love of a charming husband has been added to her complete prosperity. Her friends tried to change Shurka’s fate and find a good groom, but Shurka was only interested in the school, its students and their problems. And when Krushinskaya took up the affairs of Zhenya Zakharov, whose mother and sister died at the hands of murderers, the overly active teacher herself became the target of the criminals’ hunt. And Shura’s life became unbearable. Only suddenly, with the help of private detective Sergei Kotyatich, who was in love with Shura, everything changed in the lives of the three friends...