Super sweet warning! Forced to disguise herself as a man for eighteen years, the Great Xuan Emperor Xiao Jinyu is determined to abdicate, just as her elder brother Xiao Jincheng, who has been missing for three years, leads his army back to the capital. She tries every possible way to hand over the imperial jade seal, but gradually develops feelings amidst the protection of Regent Pei Zheng. When a military rebellion breaks out in the southern border, she takes the initiative to go to the front lines to stabilize troop morale and rescue wounded soldiers, and works together with her elder brother and Pei Zheng to quell the chaos; finally escaping through the battle of the old beacon tower, she secretly issues an imperial edict to pass the throne to her elder brother, goes to Jiangnan with her imperial concubine mother and Pei Zheng, and lives a free and stable life.