Little dragon girl Hai Lan Zhu has the power to control the water as her tears can bring rain to the world. She comes to the mortal realm to complete the task of letting the rainfall. By chance, she meets Lu Hai Sheng at the temple of the dragon king as he is on a mission to solve a case. Hai Lan Zhu cleverly sticks to Lu Hai Sheng in order to stay by his side. However, her eyes which are a priceless treasure turns her into prey among the demon world.