Astra Eltsova, who is engaged in private investigations, came to a villa in Crimea at the invitation of the owner, Akim Yudin. He asked her to understand the incomprehensible events taking place there: the young wife of Yudin’s son thinks that someone is hiding in the house, and this is driving her crazy. Fictitious fears ended in a real crime: the maid Katya was stabbed to death. The police adhered to the version of a maniac, but Astra had no doubt that the murder was connected with the skeletons in the closet, which the Yudins carefully concealed. Especially when she found out that nearby in the mountains there was a dolmen named “Casket of Proserpina”. But what does the ancient myth of the goddess of the underworld have to do with the family of a successful businessman?