The Eye of the Dragon Princess

What she thought was a beautiful start turns into a wretched fate because the love between a human and a god can never be.
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, turn her into prey in the demon world.
(Source: ChineseDrama.info)
~~ Adapted from the novel "Strange Stories from a Chinese Studio" (聊齋誌異) by Pu Song Ling (蒲松齡).