The modern ace female spy "Phantom" was double betrayed by her organization and her lover while performing a mission, and died of hatred. When she opened her eyes again, she was reborn as Su Jinyan, an unpopular concubine in the Dajing Dynasty. She was designed by her aunt to marry Xiao Yexuan, the seventh prince with a violent temper and disabled legs due to a fall from a horse. Xiao Yexuan was the enemy target who needed to be assassinated in her previous mission, and he was her veritable "dead enemy".
Su Jinyan originally wanted to get rid of this enemy from his previous life on his wedding night, but he discovered that Xiao Yexuan's disability had a hidden meaning. He was not as incompetent as he appeared, but was hiding in secret to investigate the truth about the horse's fall and the mystery of the death of his mother and concubine. The two went from testing each other and being wary of each other to discovering a common enemy - the prince and the forces behind him (who were also partners in Dajing of the organization that betrayed Su Jinyan's previous life).
Su Jinyan used his modern espionage skills—disguise, drug making, intelligence analysis, and psychological profiling—to navigate the deep compound with ease, defeating his evil aunt and sister Bai Lianhua step by step, and firmly holding the stewardship of the Hou Mansion in his hands. At the same time, she established an intelligence network covering the capital for Xiao Yexuan, becoming his sharpest knife. Xiao Yexuan provided protection to Su Jinyan as a prince, and the two gradually developed from a "contracted couple" to a true soul mate. They joined forces to find out the mastermind in the turbulent court battles and house fights, avenge their relatives, and finally assisted Xiao Yexuan in ascending to the throne. Su Jinyan also went from an abandoned son to a queen who looked down upon the world.
