In an alternate history where black “Cross” people rule over white “Noughts”, young couple Sephy and Callum are divided by their colour but united by love.

In a dusty post-war summer in rural Warwickshire, a doctor is called to a patient at lonely Hundreds Hall. Home to the Ayres family for over two centuries, the Georgian house is now in decline. But are the Ayreses haunted by something more sinister than a dying way of life?