| Director | Lee Lu-da, Lee Ru-da |
|---|---|
| Box office | $252,521 |
Geo-ul resides with her family, which includes her younger brother Doo-on. She is loud and unmarried. She resolves any grievance raised by her neighbors. She doesn't get along with her brother, so their connection is strained. She resolves to become independent after they argue one day. She moves in alone in Baeksoo Apartment. She hears sounds coming through the flooring at four in the morning on her first night in her new house. The unidentified noise keeps her from falling asleep. Geo-ul investigates the mystery of the sounds coming from the floors with her neighbors.