A famous metropolitan poet comes to quiet provincial Kolomna. He performs with a sensation in the house of the mayor, charms all the ladies, but proposes to the most modest one - Aglaya Rukavishnikova. The town gossips are shocked, because Aglaya is considered strange and even abnormal because of her passion for poetry. How did she manage to charm the capital's lion, who now looks absolutely happy and in love? However, a few days before the wedding, the bride is found murdered! And the postmaster, Felix Yanovich, is sure that the matter is much darker and more mysterious than it seems at first glance.