Kwon returns to Seoul from a restorative stay in the mountains. She is given a packet of letters left by Mori, who has come back from Japan to propose to her. Kwon drops and scatters the letters, all of which are undated. When she reads them, she has to make sense of the chronology.

Set in Jeju, the drama revolves around a loving, multi-generation family led by the parents, Yang Byung Tae and Kim Min Jae, and their four children Tae Sub, Ji Hye, Ho Sup, and Cho Rong, as well as assorted grandparents and uncles. The story follows the family's everyday lives and conflicts.