The demon master Yan Chixia (played by Liu Jikai) successfully eliminated the malevolent spirit of the Red Wolf within him after years of cultivation, transforming it into a young wolf girl. The two work together to travel the world, protecting the people from harm. One day, the ancient town of Moon Spirit Mountain Villa mysteriously disappears, and the court suspects it is the work of a scorpion monster in the mountain. They order Yan Chixia to investigate alongside Ye Tianqing from the 'Demon Extermination Department.' Although Yan Chixia has many grievances with the court and Ye Tianqing, he remains determined to fulfill his duty to protect the people. Yan Chixia and his group face numerous challenges before finally discovering the Moon Spirit Mountain Villa hidden by an invisible barrier. However, during their search for the scorpion monster, they are blocked by the villagers of the villa. Sensing something unusual, Yan Chixia decides to investigate secretly. At the same time, while his feelings for the young wolf girl begin to bloom in his heart, he remains focused on the mission. Meanwhile, Ye Tianqing is manipulated by a mysterious black-clad figure, leading to increasing tension in his relationship with Yan Chixia. Eventually, Yan Chixia uncovers the truth behind the incident. After a fierce battle, he successfully seals the scorpion monster and foils the black-clad figure's plot to destroy Chang'an City. However, the young wolf girl tragically sacrifices herself in the process, leaving Yan Chixia with a lasting regret. In the end, Yan Chixia and Ye Tianqing resolve their misunderstandings and continue to protect the people together, safeguarding the peace of the world.