On the eve of her wedding to Adam, Lily’s best friend Josh unexpectedly walked out of her life, and she hasn’t seen him since. Lily and Adam are blissfully happy, until he falls ill. As she cares for him in his final hours, Adam asks her to make a mysterious promise: to find Josh—and forgive them both.

When Lisa married Alex, she gave his life meaning. Alex, Lisa, and their young son Connor made a happy little universe. But then, Lisa dies in a train crash, and their universe is destroyed. Then, Alex meets four strangers. Two men and two women, who never met Lisa, but whose lives changed profoundly because she died. As Alex hears their stories, he begins to realize the world may not be as cruel and senseless as it seems. Perhaps, after all, the future is written in the stars....

Emma is just days from marrying her childhood sweetheart Richard. But what should be the happiest time of Emma's life takes a turn for the worse when, on the night of her bachelorette party, tragedy strikes. Thanks to some quick thinking from a stranger, Emma is pulled free from a totaled car before it goes up in flames. But another passenger is not so lucky.

Rachel Wiltshire has everything she’s ever wanted: a close group of friends, a handsome boyfriend, and acceptance to the journalism program at her top-choice college. But one fateful evening, tragedy tears her world apart.

Beth Brandon has always dreamed of owning a flower shop, but today the bouquets of peonies and bright spring flowers are failing to calm her nerves...because, today, Beth has a life-changing decision to share with her husband. Izzy Vaughan thought she and her husband would stay together forever, but sometime last year, their love began to fade. They both find such joy in their young son Noah - but is he enough to keep them together? Eight years ago, something happened to these two women - something that is about to bring them together in a way no one thought possible....