Over the course of several months in 1999, in different cities, one after another, for no apparent reason, three men committed suicide - a judge, a stove maker and a businessman. They did not know each other. Despite the fact that everyone has serious enemies, the conclusions of forensic experts are clear. All three gave up their lives voluntarily. In different ways, this information reached police major Artur Turaev. He very quickly suspected the series and was not mistaken. As it turned out, all three had mistresses from among the girls who worked as waitresses in a cafe owned by Serafima Kobylyanskaya. A doctor by training, she was now engaged in another business and bore the nickname Nurse. But, as it turned out, she didn’t forget about her old profession either. The nurse was ordered to infect people with incurable diseases by sending sick girls to them. Having learned about their diagnosis, fearing publicity and shame, the victims committed suicide. Until recently, this did not arouse suspicion among law enforcement agencies. Arthur Turaev collected irrefutable evidence of the criminal activities of the Nurse. The cafe was closed, but it turned out that there was no evidence against the owner. Her male accomplices took the blame. The nurse - a smart, cold, cruel lady - foresaw and calculated everything. But something happened that she never expected. This event forced her to write a sincere confession and convey her testimony to Artur Turaev...