Aruo (Gillian Chung), the dragon girl of the East China Sea, is determined to find her beloved, so she comes to the mortal Wang Sheng (Li Mingxuan) at all costs. The fox demon Xiaoman (Cui Zhenzhen) wants to get the precious spiritual leaf from the dragon girl, so she designs to break Wang Sheng's heart. Aruo has no choice but to use the spiritual leaf to repair Wang Sheng's heart, so the two girls start a "heart-stealing" contest with Wang Sheng as the center.