The weight of silence

"It happens quietly one hot August morning in Iowa: two families awaken to find their little girls have gone missing in the night. Seven-year-old Calli Clark suffers from selective mutism brought on by a tragedy that happened when she was a toddler. Petra Gregory is Calli's best friend--and her voice. But neither girl has been heard from since they vanished. Now, Calli's and Petra's parents are tied by the question of what happened to their child...