Cui Xiyue, the descendant of a princess who had been exiled to a foreign land, took on the alias Hua Yue'er and infiltrated Country E to seek revenge on her nemesis Ke Yi. She approached Wei Li, Ke Yi's beloved, only to unexpectedly discover that he was an old acquaintance from her youth, and feelings gradually blossomed between them. During her quest for vengeance, she uncovered that the real culprit was Ke Yi's elder brother Ke Yun. After the truth came to light, Ke Yun sacrificed himself to save her, leaving the future between her and Wei Li uncertain.
