The killer organization Tianyu League that Yu Mowan belongs to is regarded as a thorn in the side of Tianji League. In order to kill Tianji League at the right time, she chooses to lie dormant in her hometown Yuhu Mountain first. By accident, she discovered that the Tianji Alliance was hunting down Si Tingyu, the leader of the Si family, and the place of pursuit was at Yuhu Mountain where she was hiding. By chance, the Yu family told Yu Mowan that she was not the Yu family's biological child, but the daughter of a servant of the wealthy Shu family. In order to break up with the Yu family, who favored others and scorned others, and to hide in a different place, she decided to go to the Shu family to recognize her relatives.
