There is an emergency in the hospital - the patient died after a seemingly successful joint replacement operation. Anesthesiologist Agnia Smolskaya felt guilty - after all, it was she who convinced the woman to agree to the operation! And I decided to figure out what happened. Agnia found out that the necessary tests were not done before the operation, and the surgeon Robert Karaev, with whom she has a very close relationship, is going to enter them into the medical history retroactively. Further - more: it turned out that Robert supplied the patient not with an expensive high-quality prosthesis, but with an untested product of a new brand. Agnia faced a difficult choice: betray her lover or violate her medical duty?..