General Shouyang of the human race pretended to return to the demon slaying tribe during World War I, waiting for the opportunity to kill the demon king. The Demon King ordered to take Shouyang's fianc é e Qiushang as a hostage. The owner of the Painted Skin Workshop, Chang Mian, was mistakenly killed by Qiu Sang, causing a mix of ups and downsHe disguised himself as Qiushang through a painting. Shouyang brought Changmian back to the Demon City, and Changmian replaced Qiushang as Shouyang's wife. The Demon King discovered the true face of Changmian and threatened to steal the intelligence of Shouyang. Changmian couldn't bear to deceive againShouyang, take the initiative to reveal the truth to Shouyang. The Demon King sent troops, and Shouyang fought against the Demon King. However, at the moment of victory, he saw the long cotton of the Demon King with painted skin. Originally, Chang Mian had secretly set up a plan, risking her life and being aloneSlaying the Demon King, she disguised herself as the Demon King and went to meet Shouyang. She used her life to redeem herself and was willing to die by his sword.