Rose, a powerful hybrid demon and succubus, is summoned by a desperate young woman named Jiang Xiaoman through a bloody ritual. Jiang Xiaoman, once a wealthy heiress, had her life destroyed after her relentless harassment of Ran Yuan, the woman her father's business partner's son, Li Yan, loved. Driven by jealousy and hatred, Jiang Xiaoman sold her soul to Rose, who agrees to take her place and fulfill her wish for revenge. Rose inherits Jiang Xiaoman's body and memories, finding herself in the squalid Lower City District of Vietnam, where Jiang Xiaoman had ended up as a disgraced prostitute after being exiled from her home country.
Rose's initial plan involves navigating this new identity while seeking sustenance, as she has been under surveillance by Archangels and is starving. She quickly encounters Li Yuan, the younger twin brother of Li Yan and the feared "Dark Emperor" of the underworld. After a violent encounter where Li Yuan is in the middle of executing a drug dealer, Rose uses her skills as a masseuse to gain his favor, curing his chronic insomnia. This establishes a complex dynamic where Li Yuan is both repulsed by and fascinated with her, viewing her as an intriguing toy.
Through her work for Li Xue, a powerful Vietnamese businesswoman, Rose gains access to the Upper City District and the elite circles. She learns that Li Yan, now a successful CEO, is the key to her revenge. The opportunity arises during a major diplomatic dinner between Hua Nation and Yue Nation. Rose deliberately causes scenes to unsettle Li Yan, who is publicly engaged to Ran Yuan. She reveals fragments of her past suffering to Ran Yuan, showing her the squalid conditions she endured, which shakes Ran Yuan's perception of Li Yan's perfection.
The core conflict centers on Rose's manipulation of both Li Yan and Li Yuan. She exploits Li Yuan's masochistic tendencies and insomnia, using physical intimacy and psychological games to keep him close while gathering information. Simultaneously, she torments Li Yan by appearing in his professional sphere, reminding him of his past cruelty without fully revealing her true nature. Li Yan, haunted by traumatic memories of his abusive father and disgusted mother, maintains a facade of cold perfection but is deeply unstable. His relationship with Ran Yuan is strained by his hidden psychopathology, which Rose aims to exploit.
Rose's strategy is methodical: she lures each target into a false sense of control, making them believe she is merely a vengeful woman or a convenient plaything, while she systematically dismantles their lives. She uses her demonic abilities to read emotions and manipulate situations, ensuring that Li Yan and Li Yuan become increasingly dependent on her while underestimating her true power. The narrative follows her ascent from the slums to the heights of power, setting the stage for a final confrontation where she will reclaim her soul and destroy the men who ruined Jiang Xiaoman's life, all while maintaining her demonic agenda.
