Kogoro Akechi, the renowned detective, has vanished. Immediately following his disappearance, a series of brutal murders targeting women begins. Taking center stage is his wife, Fumiyo Akechi, who steps forward to investigate the case. Fumiyo is not an ordinary housewife; she harbors a dark and deeply disturbing secret from her past: she was raised by a notorious serial killer known only as the Magician. This background gives her a unique and dangerous perspective on the mind of a murderer.

The story reimagines the classic world of Japanese mystery writer Rampo Edogawa, shifting the focus from the famous detective to the enigmatic woman at his side. As the bodies pile up, Fumiyo must use her intimate, traumatic knowledge of a killer's psychology to track down the person responsible for the new wave of violence. She is a suspenseful figure who walks a fine line, concealing her own dark history while trying to solve a mystery that may be intimately connected to her husband's disappearance.

The narrative unfolds as an erotic suspense thriller, exploring themes of hidden identity and inherited trauma. Fumiyo’s past with the Magician is not merely backstory but a living shadow that informs her every move. The central conflict pits her against an unknown killer, forcing her to confront whether the murders are the work of a copycat, a new monster entirely, or perhaps linked to the legacy of the man who raised her. Key story arcs include the initial disappearance of Kogoro Akechi, the subsequent murder investigation that Fumiyo takes on, and the gradual revelation of her childhood with the serial killer known as the Magician.