Cui Xi Yue, the descendant of the princess exiled in a foreign country, changed her name to Hua Yue Er and sneaked into E country to avenge her enemy Ke Yi. She approached Ke Yi's beloved Wei Li and unexpectedly found that he was her childhood friend. During her revenge, she discovered that the real culprit was Ke Yi's brother Ke Yun, who had been eyeing her for a long time, and she fell into the "sweet trap" designed by him.