Told across two interwoven timelines -- "then" and "now" -- this second-chance romance spans more than a decade. In the past, teenage Macy Sorensen and Elliot Petropoulos meet at a vacation house outside San Francisco and form an intense bond rooted in a shared love of books, building their own private language of favorite words while Macy works through profound loss and Elliot becomes the person who coaxes her guarded heart open. That history ends in heartbreak on a single pivotal night, after which the two go silent for years. In the present, Macy is a pediatrics resident leading a carefully ordered, emotionally muted life and planning to marry an older, stable man -- until a chance reunion with Elliot cracks the existence she has constructed. As the narrative moves between the two periods, it gradually reveals what happened on the night that drove them apart, and asks whether a love built in childhood can survive the silence and grief that followed. The book is known for its emotional intensity and its tender treatment of love, loss, and the words we use to hold onto people.