During the Korean War, a small and inexperienced group of student soldiers embarks on a crucial but dangerous mission to Jangsari Beach. Tasked with diverting enemy attention from the ongoing Incheon Landing Operation, the young and undertrained troops face overwhelming odds as they struggle to complete their mission with limited resources. Their journey is fraught with challenges from the onset, including harsh weather, lack of proper equipment, and the daunting realization of their precarious situation. Despite their fears and doubts, they rally together, understanding the significance of their sacrifice for the greater good.

As they land on Jangsari Beach, they encounter fierce resistance from the enemy, resulting in intense and harrowing combat. The young soldiers must summon all their courage and resourcefulness to fight back, relying on their camaraderie and sheer determination to push forward. Meanwhile, a war correspondent sheds light on their plight, drawing international attention to their bravery and the dire circumstances they face. The initial phase of their mission sets the stage for a grueling battle for survival, highlighting both the horrors of war and the resilience of the human spirit.