Yvonne Wilson makes the trek from Texas to Indiana with just one goal in mind: to convince Amishman Jake Lantz to sell her client a rare book from his collection. But Jake is as strong-willed as Yvonne. On the eve of his grandfather's death, Jake vowed never to sell the book, and he intends to keep that promise. But he can't say more than that, having never read it and not knowing why it was so dear to his grossdaadi.
Eva Graber has loved Jake since he hired her to work in his bookstore years ago, but he doesn't seem to notice she's blossomed into a beautiful woman. When Yvonne shows up and seems like she might turn Jake's eye, Eva suggests she and Jake should read the book together to find out what's so special about it.
What happens after that surprises them all, and the book leads the trio deep into mysterious questions about life and death, love and loss, and the impenetrable purposes of God.