Alexey Glebov completely stopped understanding his wife Magda. Seeing her at night near his bed with a dagger in her hands, he could not stand it and turned to Astra Eltsova, who was engaged in private investigations. Astra tried to understand what Magda’s “oddities” were, and then not an imaginary, but a real crime happened - they strangled the woman with whom Alexei had secretly met, wanting to take revenge on his wife for her coldness. Glebov swears that he did not kill her, but Magda... Delving deeper into the essence of their difficult relationship, Astra realized: the answer must be sought in the past, when Magda's ancestors got the hourglass of Catherine de Medici's personal astrologer...