Yan Xing is a strong, detective FL and a concubine daughter ( She passed the examination of being a female official of the Ministry of Justice ) and Shen Du is a Caption ( u could say ) of the imperial guards. Yan Xing's sister had a marriage with Shen Du but her sister already loved someone and flee the wedding so Yan Xing decided she will go into her place of the marriage. When they got married they didn't had a friendly friendship at first but they gotten closer when they solve cases and investigate the crime scene. But they met as children ( so basically childhood sweethearts ) and Shen Du had liked her then but he didn't know it was her, but when he found out it was her he started to fall in love with her and Yan Xing also found out and developed a crush for him and they slowly fell in love while investigating different cities but unfortunately they had to go through ups and downs.

-I really like the investigating scene they did
-He fell first, he fell harder

Ding Yuxi did really good in this drama, his acting, sword fighting and his look so good looking!
( My favourite Male actor! )