Modern girl Yun Mengyao traveled to Yun Dynasty due to an accident and became the third lady of Yun Mansion. Later, due to the marriage granted by Emperor Murong Ye, she was betrothed to Murong Yunxuan and became Princess Jing. However, Murong Yunxuan and Lu Shaoping had a bloody feud. Can she help Murong Yunxuan resolve this feud? Can she return to modern times?