Xiao Wei is a fox demon who feasts on human hearts in order to maintain his clean, youthful appearance. When General Pei Rong rescues him from the remains of a battlefield and offers him a home, trouble begins. The hearts of Pei Rong and her husband, Wang Sheng, are Xiao Wei's biggest desire - however, both are desired for very different reasons.

Every few hundred years, the most powerful demon on earth—a snake demon—awakens, and the Yin-Yang Masters are summoned to the capital. Meanwhile, the Princess of the realm has her own plans, as she conspires to claim the demon’s power.

After his father is captured by a powerful enemy, young swordsman Jian Wushuang trains at Lingxiao Palace to seek revenge and rescue him—unaware that deadly secrets and hidden dangers await within the palace walls.

Fu Xiao Xiao lives with her father after her parents divorced. Her father is always busy with his researches. She doesn't have friends and is being bullied at school. One day a new student joins her class. Xiao Xiao discovers that they are actually neighbours. They become close while going to school and back together, even more than friends..