Alexandria, a small town in the South: Here, Harriet Cleve grows up in a home full of security, yet a dark shadow looms over her childhood. Twelve years have passed since that moment when the Cleve family's world abruptly came to a standstill: a neighbor found Harriet's nine-year-old brother Robin hanging from a tree. The circumstances of his mysterious death have remained unresolved all this time, and so, in this hot summer, the headstrong Harriet resolves to find Robin's murderer at any cost.