A teenage girl in Eastern Kentucky has been isolated since birth. She experiences abuse from her father as unquestionably the will of God. She obeys his rules in hopes of banishing her demons and finding redemption. But when she breaks a rule in order to teach herself to read the Bible, she discovers something more powerful than God's laws. A hidden letter written sixteen years prior by a woman named Allie to her lover, Jute, reveals both disturbing and electrifying secrets. She feels called to find Jute and deliver the letter to her, even if none of the maps in the Bible show the way to Nashville, Tennessee. Meanwhile, in Nashville, Jute has decided to let go of Allie's things. She asks her son, John, to take the boxes from the attic to the barn. To him, it's all junk. He was never told about Allie. But, when John discovers an old photograph tucked inside one of the notebooks, he is instantly drawn into the mystery of what happened to the girl. What he discovers is even more horrifying than the secrets his mother is hiding. He wants to forget it all, but he can't.