A story about star crossed lovers, Seungyoo (Park Shi Hoo), Kim Seongjoo's son and Seryung (Moon Chae Won), daughter of Prince Suyang. Prince Suyang wants to ascend the throne at all cost, but his rival Kim Seongjoo is always preventing him to do so.
While all this political war is happening, a fateful encounter takes place when Seryung, an optimistic and brave girl, meets Seungyoo, a handsome and wise man, by pretending to be her cousin Princess Kyung He (Hong Soo Hyun). Without realizing the truth, the two fall in love and eventually have to face the reality that their parents are sworn enemies.
