Upon receiving a phone call, Yun-ji rushes home while her mind is lost in thoughts of the past on the subway. Lost and found truly begins as we find a young Yun-ji sitting in the subway's lost and found center. The room filled with lost items mirrors the confusion felt by the 8-year-old girl inside. Even now, the food she lost yesterday emits a rotten odor, and it is waiting alongside her younger self at the lost and found center. It feels all the more heart-wrenching because the wait could last forever. (LEE Hyunkyung)