Macy is settling into an ambitious if emotionally tepid routine: work hard as a new pediatrics resident, plan her wedding to an older, financially secure man, keep her head down and heart tucked away. But then she runs into Elliot —the first and only love of her life. Once upon a time, Elliot was Macy’s entire world—growing from her gangly bookish friend into the man who coaxed her heart open again after the loss of her mother, only to break it on the very night he declared his love for her. Told in alternating timelines between Then and Now, teenage Elliot and Macy grow from friends to much more. As adults, they have become strangers to one another until their chance reunion.