The Secret Detonator

Major KGB Sergey Druzhinin becomes an accidental witness to the explosion of an overcrowded tram, in which his acquaintance was traveling. Understanding Sergey's direct interest in solving this crime, the city's Interior Ministry leadership involved the major in the investigation.... It turns out that the bloody act was carried out by the jealous husband of Druzhinin's acquaintance. Fearing legal punishment, the man took his own life. The case could be closed. However, Sergey is convinced that the perpetrator did not act alone – behind the explosion is surely a mastermind of the crime, whose plans include continuing to kill innocent civilians. This version was soon confirmed by a new horrific terrorist attack…