Watch HDToday. The documentary is based on 2 parallel lines: one is Valery Gergiev's trip to Tskhinvali after the Georgian-Ossetian conflict and the history of preparing and holding a concert in the destroyed city.The second line is the Maestro's concert activity, rehearsal and staging in London of Wagner's famous tetralogy "The Ring of the Nibelung", the final part of which is the opera Twilight of the Gods