Ten years ago, Zijin and her family were falsely accused of treason, and their home was raided. Afterward, she met Yuan Xian and entered the Dark River. Ten years later, she becomes an assassin of the Dark River, assuming a new identity as the Crown Prince's consort, Zhao Yao, and enters the imperial palace. On the day of a grand celebration, the Crown Prince dies, and Zhao Yao, as the Crown Prince's consort, is ordered to be buried alive with him—perhaps having anticipated it all. At that moment, Zhao Yao reveals she is pregnant. Just when it seems all hope is lost, the Prince steps forward to testify. However, some with ulterior motives use the situation for their own benefit...
