A young maiden finds herself at the center of a rivalry between two suitors, both who claim to love her and want her for themselves. One is the arrogant and ambitious Duke, whose wealth and power fascinate her. The other is the sensitive and sweet Prince, whose vulnerable and charming nature fills her heart with joy. Now, she must decide who she wants her future with, torn between the two and struggling with her feelings for both. But little does she know that her choice has unexpected consequences.

The East Kingdom's princess was known to die in a very tragic way. But it was still unknown and controversial until now. No one knew who she got married to, or how she died. That was what made Yoon Yeonseo interested in her story. Things started to change when she accidentally travelled back time to 300 years ago, the year of King Sunoo's reign. Now it was her chance to find out what actually happened to the princess. From how she got married and whom she married, to how she died and why she died. To her surprise, there was suddenly an unknown man in the princess's life. There was no history about the man and his contributions to the kingdom. But suddenly, he had her heart and she was starting to dread to come back to the present time. And that man was the nobleman, Yang Jungwon.