Jiang Chi was driven out by his clan as a good-for-nothing and forced to marry Su Qianxue, known as "the ugliest in the whole city". On his wedding night, he awakened the Cultivation in Sleep System — cultivating arduously in dreams and waking with a full year’s worth of skill. Openly he works as a gatekeeper and menial servant of the Jiang family; in secret he slays his foes, sows strife to pit the Jiang clan and Flying Cloud Stronghold into a deadly fight, and step by step washes away his humiliation. Beneath her veil, Su Qianxue holds a stunning face and suffers from a strange, deadly poison. Jiang Chi kills all who dare mistreat her and flees far away with her to Ningyang. In the new city, hidden schemes run rampant — the city lord is poisoned, the deputy lord plots usurpation, and the Heavenly Sect moves in the shadows. He inserts himself into the turmoil as an assistant at a medicine shop. On his path to protect his wife, he gradually uncovers the truth behind a twenty-year-old poisoning mystery.