In an Arctic village in 1931, British mapmaker Walter Russell selects 12-year-old Eskimo Avik as his guide. When the boy contracts tuberculosis, Walter flies him to a Montreal hospital, where Avik meets Albertine and is infatuated. A decade later, a grown Avik encounters Albertine again in London, where he's serving as a British combat pilot. Despite her relationship with Walter, she and Avik begin an affair.

Nathan Algren is an American hired to instruct the Japanese army in the ways of modern warfare, which finds him learning to respect the samurai and the honorable principles that rule them. Pressed to destroy the samurai's way of life in the name of modernization and open trade, Algren decides to become an ultimate warrior himself and to fight for their right to exist.