Denounced by his wife as a possible spy in 1939, Janusz (Jim Sturgess) finds himself in a remote Siberian labor camp. Faced with brutal conditions inside and out, Janusz is determined to escape. A blizzard provides him with the perfect opportunity, and he and a small group of fellow prisoners make a break for it. Escape, however, is the easy part, for Janusz and his companions face a 4,000 mile trek on foot through the frozen Himalayas before they can truly be free.