At the Łódź film school, during the realization of a student short film, the body of Grzegorz, one of the students, was found. The victim died of a knife blow. The investigation is being conducted by Kuba, Beata and Waldemar. The Ultraviolet team is also joining the investigation. Ola and Piast search the computer of the murdered. Thanks to this, they learn that Grzegorz was preparing a documentary about the famous director Andrzej Brejdel. He accuses the artist of stealing an idea for a film that opened the door to an international career.