Employees of the Moscow Criminal Investigation Department, headed by Colonel S. V. Derkovsky, are searching for criminals, making a composite of the criminal together with a witness, studying the personal files of employees of one of the motor depots, interrogating the suspect, and taking fingerprints. Employees of the Office of the OBHS (C) (department for combating the theft of socialist property and speculation) go to the sausage factory in the city of Verey, Moscow region, check the quality of the products, set an ambush, and search the factory director. Interrogation of witnesses and a suspect in theft. Obtaining an arrest warrant from the Moscow prosecutor. Investigator of the Prosecutor's Office V.P. Arapov is investigating the murder case: he finds out the name of the murdered woman, talks with relatives and friends, arrests a murder suspect. The trial of Bodrin - accused of murder.