Set on the serene coast of Maine, the story revolves around two elderly sisters, Libby and Sarah, who have grown closer with age but are fundamentally different in temperament. Libby, who is now blind, often expresses bitterness and frustration, while Sarah remains gentle and accommodating. They share a house that has been in their family for generations, and as summer wanes, they reminisce about old times, the joyful and the sorrowful, reflecting on their now distant past and pondering their uncertain future. Their conversations are interspersed with visits from their quirky neighbor Tisha and the charming Mr. Maranov, an old Russian gentleman who is facing his own solitude.

As the sisters navigate their daily routines, they are confronted with decisions about their lives and home. Tensions rise as old grievances resurface, but moments of tenderness also reveal the deep affection they have for each other. The annual migration of whales past their coastal home serves as a poignant reminder of nature's constancy amid human frailty. As the narrative unfolds, themes of aging, family, and the passage of time are delicately explored through the sisters’ interactions and their quiet, introspective moments.