Someone killed an old woman in Petersburg, someone found her daughter with ex-husband in a pool of blood in Moscow. It seems to be simple: arrest the suspect, and he gives a very confusing statement. Nothing is doge it. But the experience and intuition do not allow the investigator Tatiana Obraztsova and operatives Anastasia Kamenska stay on a simple solution. They clearly shoved a red herring. But even when they calculate the real culprit, it is not easy. Now we must decide what is more important: the letter of the law or human life ...