Long Ming, a young man from beyond the frontier, carries the mystery of his origins and half of a broken sword as he travels to the Central Plains in search of clues. He joins the rundown Four Seas Escort Agency. Meanwhile, the Yunxing Escort Agency secretly keeps evil spirits under its control and repeatedly plots to harm him. Relying on his martial arts skills, Long repeatedly escapes danger. He meets Su, a young exorcist, and Xiaoyue, a girl from the ghost clan. While escorting precious cargo across the land, the three investigate the Yunxing Escort Agency's conspiracy with demons and spirits to frame innocent people. Along the journey, the demonic power hidden within Long Ming gradually awakens. Together, the three fight evil forces and uncover the long-buried truth behind the great war between the demon clans twenty years ago.