What is Коса about (plot, summary)
A teenage girl is murdered in Kalinigrad. The investigator Eva Kaidas recalls 13 murders 20 years ago. Then the serial killer, having altered his voice, talked to the host of a live show Roman Rakhmanov. Going through a complete denial of each other, a passionate romance and mutual suspicions Eva and Roman solve the murder mystery and come to terms with their own fears and emotional trauma.