After Returning From a Ten-Year Disappearance, the Di Daughter of the Marquis's Manor Goes on a Killing Spree

Xie Mianmian was the legitimate eldest daughter of the Yongchang Marquis Manor who disappeared ten years ago during the Lantern Festival. After being rescued from human traffickers by the Crown Prince, she lost her childhood memories and was raised as a soldier in the imperial secret police organization known as the Anying. Over the decade, she endured countless life-and-death struggles, eventually earning the nickname "Little Demon King" and becoming the Crown Prince's most trusted personal guard. Despite her violent upbringing, she maintained a deep loyalty to the Crown Prince, who had pampered and protected her throughout her service. When the Crown Prince revealed her true identity, he ordered her to return to her birth family to acknowledge her ancestors, promising to bring her back within three months. He assigned Nanny Qi, a former senior palace attendant, and Lian Qiao, a skilled martial artist, to accompany her.

Upon arriving at the Yongchang Marquis Manor, Xie Mianmian encountered immediate hostility. The main gates were shut tight, and the household staff refused to recognize her, with the steward claiming she was an imposter. Her younger brother, Xie Rujue, aggressively confronted her, calling her a wild girl and demanding she be driven out. Xie Mianmian effortlessly subdued him with a grip that caused him severe pain, establishing her physical dominance. When the Marquess's Wife appeared, she initially defended her youngest son and threatened Xie Mianmian with violence. However, Xie Mianmian countered by seizing her wrist and delivering a chilling warning about the rules she learned during her ten years of survival. The Marquess's Wife, terrified by this stranger's demeanor, retreated in fear.

The situation escalated when the Marquess's Wife revealed that Xie Mianmian had an adopted sister, Xie Siyu, who was currently attempting suicide on a rope. Xie Siyu had orchestrated this act to make Xie Mianmian feel guilty and to secure her mother's favor. Xie Mianmian intervened, cutting the rope to save Xie Siyu, but when the family blamed her for the distress, she threatened to re-hang Xie Siyu unless they apologized. Faced with the prospect of their adopted daughter's death, the Marquess's Wife and Xie Rujue begged for mercy. Xie Mianmian then demanded her rightful courtyard, Wenzhao Court, which had previously belonged to her grandfather. The Marquess's Wife reluctantly agreed, hoping the move would teach the "wild" girl a lesson.

As Xie Mianmian settled into Wenzhao Court, she discovered the servants assigned to her were incompetent and disloyal. She and Nanny Qi quickly disciplined them, establishing strict order. Her eldest brother, Xie Rujin, returned from military training and, fueled by his mother's and younger brother's complaints, confronted her to teach her manners. He underestimated her capabilities, assuming she was merely a rough street urchin. Xie Mianmian, however, revealed her superior martial arts skills, binding him with silver threads and exposing his guilt over losing her as children. She forced him to acknowledge his failure before releasing him. The Marquess, Xie Hongyi, summoned the siblings to the front hall, where he reprimanded the household for the mishandling of her return. Xie Siyu manipulated the situation by feigning innocence and offering Xie Mianmian clothes and jewelry, which Xie Mianmian coldly rejected, further painting herself as the ungrateful outsider in the eyes of the family.

The core conflict centers on Xie Mianmian's struggle to reclaim her identity and status in a family that prefers the compliant, adopted Xie Siyu. While the Marquess's Wife and Xie Rujin view her as a dangerous, uncultured threat, Xie Mianmian remains detached, relying on her combat skills and the strategic guidance of the Crown Prince. Her return disrupts the delicate power balance within the manor, as she refuses to play the role of the submissive sister. The narrative follows her methodical dismantling of the family's attempts to marginalize her, from the gate incident to the courtyard dispute and the martial confrontation with her brother. As she integrates her Anying training with her noble lineage, Xie Mianmian prepares to assert her authority, setting the stage for further clashes with the family members who seek to diminish her presence.