Based on the Bongo-dong battle in 1920, which is remembered as the greatest victory of the Unified Korean Independence Army versus the Japanese Army.
In 1920, when Korea is under Japanese rule the Korean Independence Army’s Hae-chul (Yu) 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 (Ryu), 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.