"There is no paradise on earth." In the North Korean army closest to the military demarcation line, Sergeant Gyu-nam has always longed to start a new life on the other side of the wall. When he was about to retire after serving for ten years, he decided to risk his life to escape from North Korea, but was repeatedly obstructed by Hyun-sang, a security officer he had known since childhood. Under the tyranny of power, Gyu-nam and Hyun-sang are caught in a deadly chase. Who is the hunter and who is the prey? Does the free country that Gyu-nam pursues really exist? Lee Je-hoon and Gu Kyo-hwan have a tacit understanding and sparks in their rivalry. Their unrestrained performance makes the action scenes thrilling and makes people hold their breath; Song Jiang, who is currently serving in the military in real life, also plays a special role, involving the intricate relationship between the characters.