Colonel of the MUR (Moscow Criminal Investigation Department) Vodopyanov arrives to improve his health at an Adyghe sanatorium. By chance, he becomes a witness to the mysterious death of a young woman from an old noble family. She wanted to give birth and came to the resort with her husband for treatment for infertility. An unfortunate accident—or a murder? Local colleagues actively involve the colonel in the investigation. For the first time, Vodopyanov learns about the existence of ancient dolmens that played a fateful role in this tragedy. The story ends in a very unexpected way…