Years ago, a civil war in the Liangxi dynasty split it into two nations, Weisi and Jiangyu. Since then, fighting has raged along the Lishui border between the two countries...
Qin Qiqi is the eldest daughter of the Duke of Qin's household in Weisi. A chance encounter brings her together with the refined young gentleman Shangguan Yu, and they fall for each other. Just then, the Qin family is caught up in a political storm. To protect her family, Qin Qiqi has no choice but to marry the crown prince, Nangong Xuan. Meanwhile, Shangguan Yu becomes an adviser under Qin Qiqi's eldest brother, the great general Qin Yiming. With Jiangyu's army bearing down on them, a conspiracy is unfolding. Where will Qin Qiqi's heart ultimately lead her? And what secret past lies between the Nangong and Gongxi royal families?
