Modern wilderness survival expert Chen Yuan transmigrates to the chaotic, famine-stricken Da Li Dynasty, becoming a despised, worthless son-in-law. Facing a desperate situation at home with no food and ruthless relatives trying to sell his wife's younger sister, he fiercely breaks the deadlock with his hardcore survival skills and combat arts—hunting wild boars, collecting bounties, and securing the position of chief hunter at the county yamen. He sets up serial schemes to wipe out fierce bandits and overthrow corrupt officials in league with bandits, getting exceptionally promoted to a border garrison centurion through military achievements. Assigned to the cannon fodder camp, he refines pure salt, builds ice waterfalls to crush barbarian cavalry, single-handedly slaughters generals, and uses fire blades to treat wounds and subdue loyal men. Facing his superior's attempts to steal credit and humiliate his wife, Chen Yuan patiently lays out his plans, about to embark on a bloody path of rise from a son-in-law to a chaotic-era warlord.