During the Korean War (1950-1953), right-winged families, hiding in Mountain Guwol from the North Army's massacre, organize a combat unit under the direction of Kim Jeong-suk, a woman commander, and inflict the enemy by harassing the rear. Knowing the fact, the Korean army infiltrates Captain Kim Jong-byeok into the area with a mission to protect them. After a while, Kim Jeong-suk and Kim Jong-byeok fall in love with each other, and all the people in the mountain are finally rescued by the Korean army after their resistance against the North.