Summoned to the Dragon Clan palace as a potential bride for the Dragon King, Princess Ruiying of the weak Rat Clan has no interest in competing against the other princesses. Her true priority lies in the Dragon palace's extensive library, renowned as the world's largest. One day, while engrossed in reading, Ruiying is interrupted by a handsome man from the Dragon Clan. As he kisses her out of the blue, he utters the words, "I've been searching for you." Suddenly, Ruiying's destiny takes an unexpected turn.