Strange things were happening in an ordinary hospital. One by one, under mysterious circumstances, three deaths took place, and these deaths couldn't in any case be called an accident. In the pocket of each victim, a note was found addressed to the chief pathologist of the hospital, Dr. Alexander Azin. Were these deaths somehow connected with the detective story that Dr. Azin once desired to write, and about which he mentioned in an interview with a young investigative journalist? Or, was there a killer pretending to be a doctor?

Cheerful old woman Margarita, a connoisseur of tea ceremonies and an assistant to the investigative journalist, decided to solve the riddle of mysterious deaths in the hospital. Working surreptitiously, she was determined to gather evidence. However, behind the scenes of the hospital, she not only immersed herself in the medical environment to find answers to questions pertaining to three murders but also came across face to face her own mysterious past!