A talented scientist and engineer A.N. Gramov creates a unique psychotropic generator with which you can influence a person wherever he is. In fact, he created the latest psychotropic weapon. Realizing this, Gramov wants to prevent the KGB from taking advantage of his discovery, but dies. Soon his wife, children and grandchildren die one after another. Investigator A.B. Turetsky, who by the will of fate was involved in this case, is conducting a private investigation into the circumstances of the death of Gramov and his family.