Three women - the old mother and her two daughters - contemplate their family life and their bottled-up feelings through the novel's placating yet oddly unnerving prose.

Years and Years is divided into four large chapters; the first unravels from the perspective of Sejin, younger daughter, the second from that of Youngjin, older daughter, the third from the mother's, and the fourth, back to Sejin's. Throughout the course of the novel, a number of themes are developed, including its discussion of interracial marriage, different forms of family, and sexual minorities. Circumstances and history forced the mother to the life of obedience, familial obligations and financial hardship forced Youngjin to give up her dream and support the family, and the reality of her culture forced Sejin to be in the closet. And all the while, these three women, while empathizing with each other, seem entrapped in the cycle of forcing each other to further succumb.