I'm watching this drama for the third time! I love it. It's very beautiful story wise and setting. The actors portray their roles beautifully and with great emotion and conviction. You will cry with the main cast and despise the antagonists (there are quite a few). You will feel frustrated, shocked, happy, sad, angry and relieved. It definitely hits all of the emotions.
Basically, it's a about a spirit master (one who tames wayward earth spirits or animals that take human form) who wishes to be free of her constrained and abusive life. She meets a handsome merman who is brought to the Spirit masters with three conditions: 1) Make him speak. 2)Make him cut off his tail. 3)Make him give up his mermaid pearl. This is so he can be the property of a spoiled and evil princess called Fairy Shande. Instead of just taming the merman, our main character Yun he falls in love with him and their struggles against evil begin. There is a lot more to it but that's the basic summary. It's a very good story, highly recommended!