The Federation's top agent, "Nightingale," died on a mission. When she opened her eyes, she had become Shen Qingyuan, the much-ridiculed good-for-nothing legitimate daughter of the Duke of Zhenguo's household. Her birth mother died young, and her stepmother treated her cruelly. In the end, she died with resentment in her heart in the woodshed.
When an agent's soul inhabits a frail body, the timid girl's eyes become sharp with resolve. Bullied by the servants, she easily fights back with her combat skills. Publicly humiliated by her half-sister, she dazzles everyone with her self-defense techniques, breaking free of the good-for-nothing label.
Armed with modern forensic knowledge, she painstakingly uncovers the truth behind her mother's murder. With her business acumen, she opens a rouge shop and monopolizes the capital's market. And with her advanced military-industrial ideas, she submits plans for an improved catapult to aid the border campaign.
From a pawn anyone could manipulate to an extraordinary woman who stirs up the imperial court, Shen Qingyuan wields an agent's blade to cut through the predicament of a legitimate daughter in ancient times. She advances carefully through the vortex of power struggles, protecting those around her while carving out a place of her own in the game for the realm.
