Four freshmen arrive at college from completely different worlds: Lainey, a California party girl with a flair for drama; Tyson, a brilliant scholar and aspiring lawyer from Washington, D.C.; Summer, an ambitious, recruited athlete from the Midwest; and Hannah, a mild-mannered southerner who is content to quietly round out the circle of big personalities. Soon after arriving on campus, they strike up a conversation in their shared dorm, and the seeds of friendship are planted.

As their college years fly by, their bond intensifies and the four become inseparable. But as graduation nears, their lives are forever changed after a desperate act leads to tragic consequences. Stunned and heartbroken, they make a pact, promising to always be there for one another, no matter how separated they may become by circumstances or distance.

Ten years later, Hannah is anticipating what should be one of the happiest moments of her life when everything is suddenly turned upside down. Calling on her closest friends, it soon becomes clear that they are all facing their own crossroads. True to their promise, they agree to take a time out from lives headed in wrong directions and embark on a shared journey of self-discovery, forgiveness, and acceptance.

In this tender portrayal of grief, love, and hope, Emily Giffin asks: When things fall apart, who will be at our sides, helping us pick up the pieces?