Every first Sunday in June, members of the Moses clan gather for an annual reunion at "the old home place," a sprawling hundred-acre farm in Arkansas. And every year, Samuel Lake, a vibrant and committed young preacher, brings his beloved wife, Willadee Moses, and their three children back for the festivities. The children embrace the reunion as a welcome escape from the prying eyes of their father's congregation; for Willadee it's a precious opportunity to spend time with her mother and father, Calla and John. But just as the reunion is getting under way, tragedy strikes, jolting the family to their core: John's untimely death and, soon after, the loss of Samuel's parish, which set the stage for a summer of crisis and profound change.
In the midst of it all, Samuel and Willadee's outspoken eleven-year-old daughter, Swan, is a bright light. Her high spirits and fearlessness have alternately seduced and bedeviled three generations of the family. But it is Blade Ballenger, a traumatized eight-year-old neighbor, who soon captures Swan's undivided attention. Full of righteous anger, and innocent of the peril facing her and those she loves, Swan makes it her mission to keep the boy safe from his terrifying father.