Rinna Milford, aged only 17, holds the title of the youngest police inspector in the London Police Department. Known for her exceptional problem-solving skills, Rinna has gained a reputation as a composed and expert detective. However, despite her success, Rinna yearns to present herself as more feminine. Yet, her colleagues' expectations make it challenging for her to express her true self.
While investigating a crime scene, Rinna crosses paths with Meishi Leland, a playful but clumsy private detective. To her surprise, Rinna finds herself experiencing unfamiliar emotions. Despite Meishi's lack of investigative expertise, Rinna is unable to divert her gaze from him, causing her face to flush. After successfully solving numerous cases, Rinna faces a new mystery she cannot decipher: the throbbing of her own heart.
