Police major Yegor Daurskiy goes to a remote Cossack village in the Krasnodar region to privately investigate the double murder of his friend, a police colonel, and his wife. There he has to deal with a local criminal gang under the command of crime boss Suvorov. He also meets the local Cossacks and their chief, Peter Lazarev, who are doing everything to resist the lawlessness of local authorities and the criminal mayhem. Daurskiy succeeds in solving his friend's murder and bringing the guilty to justice. Upon closing the case he goes back to Moscow and requests a transfer to the Cossack village. Together with the Cossacks he hopes to free the town from Suvorov and his gang.