Lin Yue and Su Yao were deeply in love in their previous lives, but social prejudice kept them from being together openly. An accident sends them to an alternate ancient dynasty. When Lin Yue wakes up, she is shocked to discover that she has become a man. Even more astonishingly, Su Yao has transmigrated there too. They think they can finally cast aside the judgment of society and love each other freely in this ancient world, but reality turns out to be far more complicated.