Hwiyeon, who was once Sedo's daughter, has now become the daughter of a traitor. To survive, he disguises himself as a man so that his life is calm. Once it looks smooth. But... “Why are you doing this, Gongja-nim?” 'You don't know why I did this.' "I don't know. I am not interested in rain or rain. Please let go.” "How about this? I am very interested in things you are not interested in.” However, until he happened to meet Prince Cheongun, the beautiful daughter of Geumyulguk who disappeared, his ex-fiancé.