Su Zi'er, an orphan from the Su family in Jiangnan, was adopted by Mr. Mu from Luoyang Mountain. Time flies, ten years have passed, and Su Zi'er is already thirteen years old. A secret message came from the capital. The emperor who had saved Mr. Mu's grandson asked Mr. Mu to come to the palace to assist. At this time, Mr. Mu was on his deathbed, and Su Zi'er came to Beijing on behalf of his teacher. Three years passed in the blink of an eye. With her support, there was peace in Gyeonggi. The new king of the Beidi tribe in the northern grasslands, Yan Falcon, has basically unified the grasslands by force, posing a threat to the Yueling Kingdom in the Central Plains. So Emperor Liu Anshi, who was already a little wary of Su Zi'er at this time, sent Su Zi'er to Beidi to get married. The story of Su Zi'er and Yan Falcon began...