Vladimir Knyazev, nicknamed Monomakh, was like a bone in the throat for some colleagues and for his superiors. But since he was an excellent physician and a very good person, it was impossible to remove Monomakh from the hospital even to the chief doctor. When two patients died in his department one after another - an elderly woman Suvorov and a well-known lawyer Halperin - an investigation began. Monomakh could not stand aside and also took some steps to find out the causes of death - and unexpectedly realized that both patients were "helped" to go to the next world. What does the "angel of death" achieve and on whose side does he stand?..