Princess Zhaoyang is the only princess of the Song Dynasty. When she was twelve years old, she met Yan Mo, the master who taught her martial arts. He taught her sword practice, taught her Qinggong, taught her to protect herself with hidden weapons, flew to catch her when she fell from the tree, played the flute to her on her birthday, and made a lifelong agreement with her when she came of age. When she was fifteen years old, an envoy from the State of Wei came to propose marriage. She and Yan Mo agreed to travel around the world together in three days. She waited all night. Before Yan Mo came, he received news of the enemy's attack and that his father was seriously ill. And Yan Mo is the culprit of all this. In order to gain the support of Wei, she had to marry the prince of Wei. But she didn't expect that Wei Crown Prince Xu Yi had many conflicts with her after their marriage, and the two gradually developed feelings during the quarrel. At this moment, Yan Mo appeared again. At this time, he was already the king of a country. During a patrol incognito, Xu Yi was knocked off a cliff by a master sent by Yan Mo to snatch Zhaoyang, and Zhaoyang jumped off. Fortunately, the two were caught by a tree next to the cliff. As a result, the two lovers also came together. As the plot develops, Zhaoyang discovers that Xu Yi is not as noble as she imagined, but is actually ruthless. Where should she go?