Armed with his trusty 1913 Bradshaw's Continental Railway Guide, Michael Portillo travels east through the Balkans along the most exotic section of the route taken by the Orient Express. His journey begins in Sofia, capital of Bulgaria, and includes stops in the ancient city of Plovdiv, the region of Rumelia, and former capital of the Ottoman Empire Edirne. Arriving in Istanbul, Michael takes a trip on the Bosphorus - a much-coveted stretch of water - finds out about Turkish delight and travels along the Marmaray metro line, which connects European and Asian Istanbul via a tunnel beneath the Bosphorus.