It is a dramatization about Major Kim Man-il's service during the Korean War. The Korean forces dispatch two military units to defend the Baeti Heights led by Kim. Although it is hard to do so, Kim and his senior, Kim Mu-cheol (Choe Bong), and other soldiers do their best. Kim even risks his life to save his juniors, but many die as the enemy forces approach. Meanwhile, Lee Kang-no (Yun Il-bong), a communications officer, reads a letter from his wife - missing her and his daughter. Encouraged by it, Lee risks his life to make successful communication between his military unit and the headquarters. His unit wins. Commander Kim Man-su gathers a small number of his subordinates because many had died, and encourages them to do their best toward the enemy off.

6.25战争休战时期的志异山驻扎着游击部队。在国军的不断攻击下，游击队的未来一片黑暗，队员之间也渐渐彼此怀疑起来。爱兰爱上了充满人情味的哲洙，队长却因想独占爱兰对哲洙充满了恨意。某天，为了抓住强奸女队员的犯人，队员间甚至爆发了彼此杀戮的惨剧，队伍中更引爆了炸弹。哲洙带着爱兰好不容易逃出乱局。这时，哲洙体会到了爱兰的深情，两个人相爱了。但是，目睹这一切的队长妒火中烧，刺死了哲洙。与此同时，爱兰也举枪射杀了队长。爱兰怀抱着哲洙，一步步走向深山。自由近在眼前，爱人却永远长眠了。 该片由于正面描写了游击队员形象，违反了当时的“反共法”，成为禁映作品。