在寒冷的北极，冰雪覆盖大地，北极光闪烁，映照出无尽的美丽与孤独。高考时光

　　The beginning of the 1960s, a period of aggravation of the confrontation between the USSR and the USA. In the most difficult weather conditions and with malfunctions on board, the first Soviet nuclear submarine K-3 sets off for a hike under the ice of the Arctic Ocean in order to surface exactly at the North Pole.