Hua Ximu, a resilient and gentle female doctor from Yongshi, is transferred to the border, where she teams up with Lu Chenyu, a local doctor who strictly adheres to protocols. Initially clashing due to conflicting philosophies, the two gradually reconcile under the guidance of the hospital director. Ruan Mingying, a doctor from Viet, evolves from misunderstanding to relief, growing into a key collaborative backbone. The team carries out life-and-death rescues such as a typhoon-night transfer and cross-border critical surgeries, and travels to Viet to conduct medical training. Having weathered trials, the three resolve their estrangement and forge a deep camaraderie of wartime-like medical friendship.