The Arctic Ocean Hydrographic Expedition, accomplished in the beginning of the 20th century, between 1910 and 1915, led to the last great geographical discovery in the history of the world: the discovery of the Severnaya Zemlya (back then the Emperor Nicholas II Land) and was the first to accomplish the passage from East to West by the Northern Sea Route, from Vladivostok to Arkhangelsk, having passed the winter near the Cape Chelyuskin. In Soviet time, the story of this expedition was ignored or falsified. There were two reasons for that: Kolchak, future leader of anti-Bolshevik forces, was among its participants, and most officers who took part in the expedition emigrated after the Revolution. The most successful and the most efficient of all the Arctic expeditions of the early 20th century was forgotten, erased from history. According to Amundsen, "had this expedition taken place in any other time, it would command the admiration of the whole world". The film is based on unique material: journals of participants of the expedition, their memories and photos made during the trip. All this material plunges the spectator deep inside the dramatic story, full of suspense.