Haunted by her sister's mysterious disappearance, Lucy Wilson arrives in Rowan County, Kentucky, in the spring of 1911 to work for Cora Wilson Stewart, superintendent of education. When Cora sends Lucy into the hills to act as scribe for the mountain people, she is repelled by the primitive conditions and intellectual poverty she encounters. Few adults can read and write. Born in those hills, Cora knows the plague of illiteracy. So does Brother Wyatt, a singing schoolmaster who travels through the hills. Involving Lucy and Wyatt, Cora hatches a plan to open the schoolhouses to adults on moonlit nights. The best way to combat poverty, she believes, is to eliminate illiteracy. But will the people come? As Lucy emerges from a life in the shadows, she finds purpose; or maybe purpose finds her. With purpose comes answers to her questions, and something else she hadn't expected: love.