Young and frivolous, ignorant of love and hate. Song Yunjing, the eldest princess of Northern Yan, secretly traveled incognito, and unexpectedly met Ji Xuanjue, the prince of the Western Wei Dynasty. While concealing each other's identities, Yishanxuan met for the first time and got along with each other for several months, and the two became romantically involved. However, the internal fighting in the Western Wei royal family intensified, and Ji Xuanjue was involved in the political whirlpool. On the other hand, the otherwise healthy Emperor Beiyan suddenly fell into a strange illness. After the two had no choice but to separate, the Nanchen State, which had been in the south for a long time, had long wanted to dominate the world, and tried its best to drive a wedge between Northern Yan and Western Wei. The world was once again in chaos, family and country, love and hate... But the so-called love goes deep, and what should the two do when they can't help themselves...