Three years after the Apocalypse, the late Ming Dynasty was in chaos. Refugees in the north gnawed tree bark, defeated border troops and occupied mountains as bandits, and secret messages of collusion between officials and bandits were passed on under the lantern. The world's escort agencies abide by a century-old iron law: escorts never leave people, flags never fall to the ground, no inquiries are made about guests, and no official disputes are involved. "Qingyuan Escort Bureau", a long-established escort bureau in the Central Plains, uses green bamboo escorts as tokens, and the escort flags are dyed with green ink, and travels on the business routes of seven provinces in the north and south. However, ten years ago, there was a silent bloodbath, and the entire bodyguard bureau was massacred, leaving only the young bodyguard chief Shen Yan.
