In this TV-series the events of the beginning of the 20th century in Russia are highlighted. Revolutioners, terrorists, spies - and investigator Putilovskii and his team fight them as best they can.
During military exercise a group of commandos walks into a mine field that has been left over since WWII. The only person who can save the trapped men is Serba, a surviving soldier of WWII, who was in the field back in 1943.
