Nineteen-year-old Huo Qingge joined the Northern Pass Army with a foundation in physical training. He just wanted to earn enough military merit during the two-year service period to redeem his younger brother's academic status. However, long-term retreat is not allowed in the North Pass, and all cultivation resources must be exchanged for real military service; and after every high-intensity mission, he only has a "pulse opening window" of about a stick of incense where he can borrow medicine to consolidate his growth. If he misses it, he will have to wait, and continuous forced opening will leave hidden injuries. From delivering fire on snowy nights and searching for water on saline-alkali soil, to identifying fake beacon fires, guarding grain and guarding bridges, and patrolling lines and building fortifications, he must constantly choose between missions, teammates, military achievements, and physical costs. The enemy's scout leader Wuluo also specialized in water wells, grain roads and beacons, forcing Bei Pass to run out of energy with a series of non-face-to-face battles. Can Huo Qingge truly turn his military exploits into three realms without bringing down himself and the entire team, and turn the first two years that he came here only for family debts into his own path as a frontier army?
