A suspenseful story in which detectives search for the killer of the "fallen" girls. Monika is summoned to the police to identify her murdered colleague. The investigator warns her that the killer only chooses girls from certain circles and strangles them with a yellow collar, which was used to mark "fallen" girls in the Middle Ages. Perhaps she will be the next victim. In the evening, Monika meets an elderly gentleman in a bar. He invites her to his friend's flat. Above the fireplace is a portrait of an unknown woman, and Monika realizes that the stranger is wearing the same yellow collar that the investigator showed her.
—EuroFan