The movie is set against the backdrop of the battle of Changjin Lake in the second campaign of the war against the United States and North Korea, and tells a dramatic history: 71 years ago, the Chinese People's Volunteers went to North Korea to fight in the extremely cold and harsh environment, the Eastern Front combat troops with a steel will and courageous fighting spirit all the way to chase and kill the enemy, reversing the battlefield situation, the military and national prestige.