It's October 1950, Sergeant Lee and his Eagle regiment successfully attacked and captured North Korea's capital, Pyeongyang. However, the North Korean army has backup soldiers sent from People's Liberation Army.
When Lieutenant Lee Sugyeong and her squad finds a group of dead South Korean soldiers, she fears the worst that Sergeant Lee might be dead. However, Sergeant Lee and his squad are actually stuck in a snowy forest.
Sergeant Lee and his squad sets out to Gaema Plateau on a special mission to escort marines smuggling explosives to the enemy camp. However, Private Yang Sanggil delayed the mission when he runs away to see his mother.
In order to save Private Yang Sanggi's life, the squad decides to exchange Private Chun for him. Sergeant Chun Yong Taek gets locked up for letting Private Yang Sanggil get away.
In order to save the squad, Sergeant Park agrees to become the autonomous squad captian. Meanwhile, Sergeant Lee decides to rescue his team by also placing himself inside the concentration camp.
