Senior investigator of the Prosecutor General's Office Vladimir Poremsky has been entrusted with the case of economic fraud at the large defense enterprise Raketa. Soon after the investigation began, unknown assailants kill three managers of a defense concern. Despite the fact that the murders took place in different cities, the style of the crimes is the same, and the killers themselves are like siblings. An explosion also occurred at the head office of the defense concern, as a result of which its general director was killed. At first glance, this is a typical terrorist attack. However, some details of the case make Poremsky doubt this conclusion. Working through different versions, Poremsky gets on the trail of a mysterious company involved in organizing and executing contract killings...