Crick has been home from Iraq for five years, Jeff and Collin are finally married, and Shane and Mikhail are quietly making lives better for the dispossessed teenagers who come their way. Everything is right in Deacon's world, but nothing ever stays the same.

When Deacon's best friends, Jon and Amy, answer the call of an opportunity in Washington, DC, Deacon figures that's life. You love people, and they leave you, and you survive. Even Benny, Crick's little sister, is close to grown and ready to start her own future. But Benny loves Deacon, and she owes him—she may move beyond The Pulpit and Levee Oaks one day, but not without leaving something of herself behind. And so she offers Deacon and Crick an amazing gift… and a terrifying decision.

Benny's offer forces Deacon and Crick to dredge up every past mistake and offer of redemption. And not just the two of them—everybody is forced to examine the chances they've been given and the promises they've made. In a real family, a child is a promise, and to the men and women of Promise Rock, keeping that promise will change their lives forever.