Mature young girl and immature old granny? The most bizarre cohabitation ever! Mal-soon is a tough granny in a shanty town in Busan. In front of her, 12-year-old Gong-ju appears with her baby sister Jin-ju on her back. Gong-ju claims that she is the daughter of Mal-soon’s runaway daughter. Mal-soon’s peaceful life becomes a mess with these little strangers, but Mal-soon doesn’t feel bad living with them. Their happy-yet-unpredictable life under one roof is about to start!