The story of Cora Randall's desperate quest for freedom during the Antebellum South. After fleeing the Georgia plantation to chase after the rumor about the Underground Railroad, Cora discovers not just anything, but a railroad full of engineers and conductors, and a secret network of tracks and tunnels underground. During her journey, Cora is pursued by Ridgeway, a bounty hunter fixated on returning her to the plantation she fled; especially since her mother Mabel is the only one he's never caught. As she travels from state to state, Cora struggles with the legacy of the mother who left her and her own struggle to achieve a life she never thought possible.