This excellent and breathtaking documentary is the result of a long study on the Gulag to try to understand why more than 60 million Soviet citizens were sent to the camps from 1918 to 1956, how such a massive confinement could take place during two generations. From the Solovki in the north-west to the Kolima in Siberia, from Lenine to Kroutchev, a polar geography is erected into the Gulag system. One does not escape from camps. After ten years of imprisonment, one dies. Some survived, some left traces; they witness: organisation, work and discipline, but also resistance, repression and revolt..