Cora is a slave on a cotton plantation in Georgia. Life is hellish for all the slaves but especially bad for Cora; an outcast even among her fellow Africans, she is coming into womanhood - where even greater pain awaits. When Caesar, a recent arrival from Virginia, tells her about the Underground Railroad, they decide to take a terrifying risk and escape. Matters do not go as planned and, though they manage to find a station and head north, they are being hunted.