During the turbulent Anti-Japanese War, a soldier of the New Fourth Army, Yang Haotian, manages to return to his unit after a traumatic encounter with the Japanese army. However, when he arrives at Lost Cloud Ridge, he crosses paths with the Nationalist intelligence officer, Qin Yu, who has infiltrated the area. Despite their ideological differences, the two heroes realize the gravity of the situation and reluctantly join forces to take down their common enemy. As they fight shoulder to shoulder against the relentless Japanese forces, they discover that their unified strength and the power of their camaraderie are what they need to survive the unforgiving battlefield.