The first installment in Neal Stephensons three-part Bomb Light cycle, Polostan follows the early life of the enigmatic Dawn Rae Bjornberg. Born in the American West to a clan of cowboy anarchists, Dawn is raised in Leningrad after the Russian Revolution by her Russian father, a party line Leninist who re-christens her Aurora. She spends her early years in Russia but then grows up as a teenager in Montana, before being drawn into gunrunning and revolution in the streets of Washington, D.C., during the depths of the Great Depression. When a surprising revelation about her past puts her in the crosshairs of U.S. authorities, Dawn returns to Russia, where she is groomed as a spy by the organization that later becomes the KGB.