The moment the female lead transmigrates, she discovers that she has been betrothed to someone. At their very first meeting, she knows he is not the right man for her. With the male lead's help, a prince, she successfully calls off the engagement. Afterward, she plans to build a career of her own and leave the family that has never welcomed her. Just as her career takes off and she is ready to escape the depths, she discovers that she is not her father's biological daughter. To uncover the mystery of her own, or rather her original body's, background, she is forced to become embroiled in court politics. The female lead finds herself in danger again and again, and each time the male lead saves her. Even a heart of iron gradually melts. With his help, she discovers that she is actually the princess of the Eastern Kingdom. To find out what is really going on, she decides to travel there alone. But the Eastern Kingdom turns out to have a blood feud with the country where she used to live. When the princess of the East and the prince of the South meet again on the battlefield, what will they feel? In the end, though, the two of them get a happy ending.
