Rei, Kiki, and Ai are three sisters divided by distance and circumstance. Ambitious Rei works in finance in London; Kiki is the single mother of a young son, working in a retirement home in Tokyo; and Ai, the youngest, is a peripatetic Japanese music idol. Having lost both parents, one way or another, the sisters rely on each other as family, far-flung as they are.

When Ai is embroiled in a scandal, Rei and Kiki pause their own lives to rescue their baby sister. Over the course of a summer spent in their childhood home on the Japanese coast, the sisters will reunite with their sharp-edged grandmother, care for Kikis irrepressible son, and silently worry about Ai, all while carefully not talking about the circumstances of their mothers death fifteen years before. But silence between sisters can only last for so long