In the Ssangmun-dong district of Seoul, five families live in such close proximity that their joys and tragedies become communal property. The narrative centers on Deok-sun, a spirited middle child often overlooked by her parents, and her four lifelong friends as they navigate the shifting tides of the late 1980s. While the show famously teases a mystery regarding which friend Deok-sun eventually marries, its true heartbeat lies in the quiet sacrifices of parents and the enduring bond of "jeong"—a uniquely Korean concept of deep, collective affection. Through student protests, economic shifts, and the simple act of sharing a bowl of rice, the series explores the profound beauty found in the mundane rituals of domestic life and the inevitable heartache of growing up.