The Later Tang Dynasty was poor and weak, the country was poor and the people were in poverty, and evil spirits were even more rampant. The half-human wolf demon Yu Niansheng, who has been incognito in the human world and has hidden his identity for thirteen years, has been renamed Gu Li and has been hiding in the south totem army of the Medicine Emperor Palace, working as a dutiful bodyguard. However, in his heart, he has his own purpose of helping the Lord of the Demon Realm to revive the Yuluo Demon Kingdom. During a hunt for monsters, Gu Li unexpectedly met Lin Yuelan, a chivalrous woman who disguised herself as a man. Later, due to Gu Li's many life-saving graces and care and concern, Lin Yuelan secretly fell in love with her. However, Gu Li had already fallen in love with the person she was with. Qin Yan, the daughter of the demon lord who grew up with her childhood sweetheart, Lin Yuelan saw that Gu Li was in love with a demon. In order to consider Gu Li's safety, she accidentally seriously injured Qin Yan. When Gu Li found out, he fought with Lin Yuelan, and the two eventually turned against each other. When fighting with him, Lin Yuelan was shocked to realize Gu Li's true identity...