"After the Emperor and My Souls Exchanged, I Became the Emperor" tells the story of Xu Yan, the daughter of a general, and Xiao Jingheng, the benevolent emperor, who fell into a river during an assassination and accidentally exchanged their souls. Xu Yan was forced to serve as an emperor and lead a personal expedition to purge the court; Xiao Jingheng fought wits and deceived people in the harem to stabilize the court. From being forced to cooperate to relying on each other in life and death, the two team up to uncover the shocking conspiracy of the Queen Mother to collaborate with the enemy to kill the king, and find their true self in the life-and-death decision of falling into the river for the second time. After the soul returned to its place, the emperor and the empress worked together to reform the military and political affairs and manage the country together. This is a story about the love and intrigue of two lonely souls who move from antagonism to understanding due to misaligned identities, and ultimately protect their homeland and achieve each other's success.