The book by the famous master of the detective genre Sergei Aleksandrovich Vysotsky includes a novel and two stories united by one main character, Lieutenant Colonel of the Leningrad Criminal Investigation Department Igor Kornilov. He is pedantic, grumpy, often frowns, does not like upstarts and opportunists, he is a reliable support for his fellow detectives, but the main thing is his enviable intuition. One tobacco crumb can lead to the criminal... The story A STAIN TURN was filmed in 1980, directed by Pyotr Zhuravlev, starring: Leonid Dyachkov, Vasily Korzun, Andrey Tolubeev.