After genetically altered weeds devastate Earth's crop lands, much of humanity turns to cannibalism to survive. Dr. Tula Macoby believes photosynthetic skin can save the human race, and her people single-mindedly embark on a mission to convert the cannibals roaming what's left of Earth. But when Levi, a peaceful stranger, refuses alteration, Tula doesn't think the only options should be conversion or death. Levi Kraybill, a devout member of the Old Order, left his Holdout farmland to seek a cure for his terminally ill son. Genetic manipulation is a sin, but Levi will do almost anything for the life of his child. When he's captured, he's sure he's damned, and his only escape will be death. Tula's superiors schedule Levi's euthanization, and she risks everything to set the innocent man free. Now she and Levi are outlaws with her people, and she's an abomination with his. Can they find sanctuary in a cannibal wasteland?