With the country on the brink of Civil War, the struggle for freedom is more dangerous than ever. Underground tells the story of American heroes and their harrowing journey to freedom, with legendary Harriet Tubman blazing the trail. Written by WGN America

10 years after Dexter went missing in the eye of Hurricane Laura, we find him living under an assumed name in the small town of Iron Lake, New York. Dexter may be embracing his new life, but in the wake of unexpected events in this close-knit community, his Dark Passenger beckons.

A chronicle of the stirring relationship of one couple, with each episode spanning a single day. The narrative will unfold to reveal significant moments in a relationship that compel us to hold true to the ones we love, from the extraordinary to the everyday.