Constantly at odds in the Chinese imperial court are the stern-faced Emperor Xiao Jinyun and spirited Empress Xu Yu. However, an accident occurs that results in the two switching bodies, forcing them to fill unfamiliar roles while grasping each other's perspectives. Amidst adapting to new identities, the duo contends with difficult duties, a tumultuous harem, and the welfare of the country. Through this adventure, the unconventional skills and personal qualities of Jinyun and Yu carry newfound significance, and as a result, they develop greater mutual understanding and empathy. Nevertheless, threats of destabilization lurk within and beyond the court, and the fate of the pair hangs in the balance. Can their astrologer uncover the secret to reversing the switch in time? Failure could ignite strife and suspicion, leading to an early end for the duo.