A trio of loyal friends - the head of criminal investigation of the Kharkov Main Department of Internal Affairs Andrey Gordienko, Bogdan Kharchenko and Dmitry Voronov every day take on the complex challenges of the criminal world: intricate murders, armed attacks, meanness in the ranks of law enforcers and deadly dangerous assignments. With a cold mind and courage they always try to be objective, but when the target of bandits become close people, the heroes find it increasingly difficult to avoid mistakes.