Businessman Igor Kostylin had his eye on the beautiful wife of Yegor Khromtsov and began to brazenly seek her love. Egor turned out to be weak in spirit, he could not protect his Lena - he only publicly threatened to take revenge on Igor and broke the window in the businessman’s car with a bottle. But it so happened that the next day Kostylin was stabbed to death, and on the Khromtsovs’ balcony a knife was found, stained with Igor’s blood. For the investigation, everything is extremely clear: the killer is Yegor. One could have given up on the guy’s future if the honest opera Bogdan Gorodovoy had not met on his way. Sensing with a detective's scent that Khromtsov had nothing to do with it, he promised to get Yegor out of trouble. And such a stubborn cop like Bogdan will not go back on his word...