Irina enjoys her maternity leave so much that she is thinking of leaving the judge's chair and devoting herself to her family. But if you are a sought-after specialist, the job will find you. Kirill's friend is writing a dissertation on the psychology of serial killers and asks her to share her experience, and unexpectedly for herself, Irina finds herself drawn into the investigation of a series of strange deaths of young women. To find out the truth, you need to team up with prosecutor Makarov, an unprincipled official, a clash with whom almost ruined Irina’s career.