Young secretary Tamara Myasnitskaya was strangled in her own apartment. Investigators are puzzled by the murderer's mysterious call from the victim's apartment on the eve of the tragedy and the appearance of the murdered woman, dressed in underwear brought by the criminal with him. Soon there is a second crime with a similar handwriting, and then - an attempt to attack Nastya Maksimova. Loginov and Petrovskaya find a connection between the victims: all the girls were fined at the same traffic police post.

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