A mysterious conductor on the Underground Railroad arrives late one night on Anna's doorway in Iowa to deliver freedom seekers. Although the masked man disappears as quietly as he came, Anna finds she cannot forget him. Nor can the conductor forget her, and when slave catchers pursue Anna and her charges, he returns to rescue them. Love blossoms, but the advent of the American Civil War soon tears them apart. Called upon to spy for the Union Army, the conductor must leave the woman he loves. Can they find each other again in the chaos and destruction of war? Is love truly enough to surmount every obstacle?