The beginning of the 70s. Major Cherkasov and his team are investigating a new case. This time we are talking about robberies. And this is the sphere of management for combating theft of socialist property (UBKhSS). During the robberies, the bandits mercilessly kill witnesses. The robberies are well organized and well thought out. And someone very knowledgeable prepares them. The leadership decides to unite the efforts of two departments of the Moscow militia against the "outlaws": the Ministry of Internal Affairs and the UBKHS. Together they are preparing an operation to arrest the gang.