1917. It's the height of the Great War & Hellcombe Hall is a house full of mystery: locked doors forbidden rooms dustsheets covering guilty secrets & ghostly noises frightening the servants. Most mysterious of all the drawing room seems to open directly onto a muddy corpse-filled trench on the Western Front... Arriving at this stately home the Doctor meets Lord Hellcombe an armaments manufacturer who has a new secret weapon he believes will win the war: he calls it 'the Dalek'. Soon the Doctor & his new friends are in a race against time to prevent the entire Western Front from becoming part of the Dalek Project!