Bai Xichen is one of the few time-traveling men.
Yuwen Qinglan is a unruly princess of the Northern Zhou royal family.
Is this accidental time travel a coincidence or destiny?
There is also the century-old duel between Lanling King Gao Changgong and Northern Zhou Dynasty Emperor Yu Wenyong. Are they close friends or old enemies?
All secrets will be revealed here...