Sisters Jin (Hee-yeon Kim) and Bin (Song-hee Kim) must fend for themselves when their mother abruptly packs her things, leaving the girls in the care of their alcoholic aunt without a word as to when she'll return. In a tale of innocence lost, the sisters try to make sense of their mother's absence. But in the meantime, 6-year-old Jin will be forced to mature far beyond her tender years.