Documentary which follows historian Dan Cruickshank and photographer Don McCullin into the heart of war-torn Syria, on a dangerous mission to document the cultural destruction wrought by so-called Islamic State, and understand what it means to the people of the nation. Their final destination is the ancient city of Palmyra, to find out what remains of the ruins. For Dan and Don these stones represent the very soul of Syria, and for Syrians and the world the debate about what to do with them is about to begin. For both men, it is a return journey to a place with which they have long been obsessed. But to get there, they have to travel through a country that is in still in the grip of war.