In 1920, when Korea is under Japanese rule the Korean Independence Army’s Hae-chul and his subordinates are carrying out the operation to deliver funds to the Korean Provisional Government in Shanghai. During the operation Hae-chul is reunited with Jang-ha, a young squad commander, whose mission is to defend Samdunja. They unite and trap the Japanese soldiers in Samdunja, soundly defeating them. Now they’re chased by Japanese troops and Hae-chul finds out that Jang-ha’s mission isn’t over yet. A crucial yet dangerous task is still assigned to him.
Over a 4 day period, a fierce battle takes place between Korean independence militias and imperialist Japanese forces in Manchuria, China. The militia includes a master swordsman and an expert marksman.