A gruesome discovery is made by a riverbank: the torso of a headless, limbless body, later identified as Yaeko Miyagawa, a middle-aged mother. Following an investigation and trial, her daughter Hikari confesses to the murder. The events that led to this tragic outcome are rooted in years of physical and emotional abuse inflicted upon Hikari by her mother, who relentlessly pressured her to become a doctor. Despite nine years of unsuccessful applications and entrance exams, Yaeko's expectations and control over Hikari's life remained unyielding, creating a suffocating environment that ultimately culminated in a fatal act of violence. Based on a true story, this series delves into Hikari's experiences, exposing the distressing circumstances that drove her to commit a heinous crime and exploring the aftermath of her devastating actions.