In a British base hospital near the front, a team of doctors, nurses and VADs are working together to heal the bodies and souls of the men in their care. This hospital on the coast of France is a frontier between two worlds: between the trenches and the home front, between the old rules, regulations, hierarchies, class distinctions and a new way of thinking. Written by Sarah Phelps (Great Expectations, Oliver Twist), this is the story of World War One's front line medics - their love affairs, professional triumphs, personal tragedies, fears and hopes as they fight for the future.