Changmian, the Sparrow Demon Painter, is the best painter in the Painted Skin Workshop. She was bound and enslaved in the Painted Skin Workshop since she was a child, and lived a bitter life. When she was young, she ran away and met the young general Shouyang. Shouyang's warm care made her unforgettable. Shouyang pretended to surrender to the demon clan in a war, waiting for the opportunity to kill the demon king. The demon king ordered Changmian to capture Shouyang's fiancée Qiusang as a hostage. After a series of events, Shouyang brought Changmian back to the demon city, and Changmian replaced Qiusang as Shouyang's wife. She painted her skin to become the demon king, went to see Shouyang, and redeemed her sins with her life.