Modern youth Bai Ye wakes up to find himself time-traveled to ancient times plagued by endless wars. With his elderly father about to be forcibly conscripted, to protect his family, he resolutely takes his father's place and plunges into the bitter, cold frontier military camp. Here there are no miraculous cheats, only swords and spears, hunger and cold, and death descending at any moment. Entering the camp for the first time, he witnesses cruel military laws, shares a squad with fierce soldiers, and struggles to survive through drill after drill, city defense, and battle array. Relying on modern thinking and fortitude far surpassing ordinary men, Bai Ye starts out as an ordinary frontier soldier, gathers his squad brothers, accumulates military achievements, and rises step by step in the turbulent battlefield.