Seong-a was a seemingly ordinary woman, but she harbored a dark secret. She had first rented a quaint, unassuming house from Yeong-su, an elderly man who lived there with his devoted wife. The charming rental was popular among families, and Seong-a had booked it under the pretense of vacationing with a young boy, whom she had claimed was her child.

After nearly a year had passed, Seong-a returned to the rental house, but this time under troubling circumstances. Yeong-su's daughter was planning to stay there with her own family, unaware of the sinister events that had unfolded previously.

Months earlier, driven by a chilling motive, Seong-a had committed an unspeakable act. She had killed the boy she initially brought to the rental house, hiding his lifeless body in a suitcase that she stored in a corner of the small attic. The tragic discovery came only when the suitcase was accidentally found by Yeong-su, who quickly spiraled into despair upon realizing the heinous crime that had taken place within his beloved property. The once peaceful rental house became stained with the shadows of tragedy, causing a wave of anxiety among the locals, including myself.

As a neighbor living close to the rental house, I often caught glimpses of Seong-a as she went about her daily routine. She would return from shopping trips, her arms laden with groceries, as she prepared elaborate meals. There was something unsettling about the way she carried herself; a quiet intensity hovered around her. Each time I saw her enter the house, I couldn't shake the feeling that the serene exterior masked deeper, darker secrets that lingered within those walls.