This episode tells the chilling story of the seventeen-year-old girl who, just before she goes off to study, lures a young neighbor boy to a pond and lets him drown. Although the community and her parents believe it to be a tragic accident, the first-person narrator reveals that she is the perpetrator, acting from a dark, nameless urge. The source focuses on her total lack of remorse or guilt, observing her own emotional emptiness and the ease of the deed. She views her prior cruelties as experiments and sees this murder as a definitive crossing of a boundary, which nevertheless does not change her. Ultimately, she leaves for her new life with the knowledge that she has killed someone and can continue living with that without any effort.

This episode paints a jarring picture of an emotionally distant family in which a thirteen-year-old girl remains completely invisible to her hardworking parents. Although she functions as the perfect daughter with excellent grades to the outside world, behind this facade she hides a cold, unfeeling personality capable of manipulative and cruel behavior. The text emphasizes how the constant focus on achievement and politeness masks the deeper, darker reality of her inner world. Due to their own fatigue and routine, the parents are blind to the truth, creating a chilling emptiness in their interactions with one another. Ultimately, the narrative suggests that this superficial harmony is the source of a dangerous lack of genuine connection and supervision.

In this chilling third installment, secretly recorded within a forensic psychiatric clinic (TBS), a female psychopath continues her raw and deeply candid story. Speaking through an AI-generated voice to protect her identity, her goal is not to shock her listeners, but to honestly dissect the inner workings of a mind devoid of empathy.At just twelve years old, she began treating the people around her as subjects in her own "social experiments." Operating under the realization that humans are highly predictable, she began to pull the strings of her classmates' lives. We hear the unsettling details of how she systematically targeted their deepest vulnerabilities: feeding a young girl’s crippling anxiety until she was entirely isolated, orchestrating a humiliating public prank on a popular classmate, and psychological playing with a lonely new girl through a cycle of false promises and sudden abandonment.