劇情:

朝鮮戰爭後期，南北雙方展開艱難的休戰談判，仍有大小軍事摩擦時有發生。在東部戰線最前沿的L高地，南方軍某中隊隊長屍體被發現，身旁竟留有內部使用的槍彈。上級高度懷疑其死亡與內鬼有關，迅速安排反特中尉江恩表赴東線調查真相。路上，江恩表巧遇當年的同期金秀赫。令江恩表意外的是，曾經手無縛雞之力的書生金秀赫在當了兩年二等兵後，搖身一變被破格提拔為中尉，成為特種部隊“鱷魚中隊”的實際領導者。

Synopsis:

Towards the end of the Korean War an uneasy ceasefire is ordered, but out on the Eastern front line of the Aerok Hills fierce fighting continues. A race to capture a strategic point to determine a new border between the two Koreas is the ultimate prize.

A bullet is then found in the body of dead company commander of the South Korean army. The bullet that killed the company commander belongs to the South Korean army. Lieutenant of the Defense Security Command Kang Eun-pyo (Shin Ha-kyun) is ordered to go out into the Eastern front line and investigate the murder. When Kang Eun-pyo arrives in the Aerok Hills he is surprised to find his old friend Kim Su-hyeok (Ko Soo) commanding troops in the Aerok Hills. Kang Eun-pyo believed Kim Su-hyeok was dead.

In their younger years, Kim Su-hyeok was a meek student, but he eventually became the leader of Aerok Company as a lieutenant. The situation in the Aerok Company raises many flags in the eyes of Kang Eun-pyo. Soldiers wear North Korean uniforms inside due to the cold weather; a 20-year-old leads troops as a captain and the reappearance of his old friend Kim Su-hyeok. The countdown to the ceasefire begins as the lives of countless soldiers fall to the wayside...