Recounts the story of the critical Eastern Line of the Underground Railroad and its role in America's 19th-century anti-slavery movement. Actors Ed Asner and Blair Underwood portray white Quaker abolitionist Thomas Garret and black anti-slavery activist William Still in dramatic reenactments filmed on location at the sites where the historical incidents took place. Interviews with top scholars explore the themes of courage and racial cooperation in the years leading up to the Civil War.