Ye Xuan, the crown prince of the Qingzhou Kingdom in Xuanzhou, is forced to kill his wife, Bai Xi, the imperial princess of the Xuantian Snake Clan. Changqing, who possesses the ability to reverse time, cannot bear to see this tragedy and decides to bring another Bai Xi from a different world, hoping to change their fate. After the modern-minded Bai Xi begins sharing a body with the original soul, the two decide to face the challenges of destiny together.