Cora is a slave on a cotton plantation in Georgia. Life is hell for all the slaves, but especially bad for Cora; an outcast even among her fellow Africans. 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--Cora kills a young white boy who tries to capture her. Though they manage to find a station and head north, they are being hunted. In Colson Whitehead's ingenious conception, the Underground Railroad is no mere metaphor--engineers and conductors operate a secret network of tracks and tunnels beneath the Southern soil. Cora and Caesar's first stop is South Carolina, in a city that initially seems like a haven. But the city's placid surface masks an insidious scheme designed for its black denizens. And even worse: Ridgeway, the relentless slave catcher, is close on their heels. Forced to flee again, Cora embarks on a harrowing flight, state by state, seeking true freedom.