In 228 BCE, a borderland in a certain kingdom was swept by sand and the glint of cold steel, until a thunderous boom suddenly tore through the silence. Lin Feng, a retired Chinese special forces sniper, transmigrated through an electromagnetic storm to the eve of Qin's unification of the Six Kingdoms, carrying an M16 rifle and 120 rounds of ammunition. Unable to speak the local language and running low on ammo, he fought his way out of a predicament where he was nearly mistaken for a barbarian. He saved a herb-gathering girl with his hand-to-hand combat skills, routed a gang of horse thieves with eight bullets, and was hailed as a “heavenly being” by the villagers. But the strange “thunder magic” also drew spies from Xianyang.