冯绍峰 彭小苒 朱正廷 程小蒙 | Ye Lingshuang and Qihai Rui were two best friends who grew up together on the Yebei Prairie in ancient times. The tribespeople may discriminate and despise Ye Lingshuang as she was regarded as an ill-fated person on the prairie, but only the Princess of Yebei, Qihai Rui, didn't despise her, and she treated her as her closest friend since childhood. This was the reason Ye Lingshuang decided to be loyal to the princess.On the other hand, Yu Xiuming, the Emperor of Chao State, had designed a plot to marry Qihai Rui to conquer Yebei because he was certain that Qihai Rui would refuse to marry him, which could give him a reason to start a war.To save her family and Yebei, Qihai Rui killed herself by jumping off the cliff. When Ye Lingshuang witnessed the fall of Yebei. she was determined to avenge Qihai Rui and her tribespeople.As a result, Ye Lingshuang infiltrated the Imperial Palace under the alias, Bai Lu. She attempted to assassinate Yu Xiuming many times but failed, which made Yu Xiuming start to notice her and finally fall in love with her. Ye Lingshuang was moved by Yu Xiuming. But her feelings became more conflicting as developing feelings toward the enemy would mean betrayal to her people. But Xu Xiuming's reign was also in decline. With Ye Lingshuang's meticulous design, the Chao State was overthrown, with Yu Xiuming heading toward his death.