The TV series "Classmates of Death" is a crime detective based on the novels by Anna and Sergey Litvinov. Dmitry Polyuanov, a successful Russian journalist, is preparing for his wedding to his charming fiancée, the modest librarian Nadezhda Mitrofanova. But on the eve of the celebration, strange things start happening around the bride. Someone kills her school friend Lena, and Nadya herself unexpectedly becomes the main suspect. After all, shortly before the tragedy, the girls had a quarrel.