Sarny, a 12-year-old slave girl in the ante-bellum South, faces a relatively hopeless life. Her chief duties at the plantation of Clel Waller are serving at table, spitting tobacco juice on roses to prevent bugs, and secretly conveying intimate messages between Waller's wife, Callie, and Dr. Chamberlaine. Then Nightjohn arrives. A former runaway slave who bears telltale scars on his back, he takes Sarny under his wing and, in exchange for a pinch of tobacco, secretly begins to teach her to read and write, a crime punishable by death. "Words," he says, "are freedom. Slavery is made of words: laws, deeds and passes." He starts by drawing letters in the dirt and cautions her that no one must know. At her baptism, Sarny steals a Bible that belongs to Waller's son, Jeffrey, and practices reading by lantern-light in the slave quarters. The same Bible serves another purpose when, on a blank page taken from it, Nightjohn forges a pass for Outlaw, a young slave, to use in escaping to freedom ...