The story set up in the early of Goryeo regime. Hae Soo, a 25-year-old girl from modern era got transported back to Goryeo dynasty and got trapped in the conflicts and struggles between princes of Wang’s House. There, she falls in love with Wang So, who makes other people tremble with fear. ~~ Based on Chinese novel “Bu Bu Jing Xin” by Tong Hua.