As World War II enters what may be the 'beginning of the end', Dr. Palfrey and his Z5 colleagues are tasked with locating many of the doctors, scientists and other prominent people who have been imprisoned by the Nazis all over Europe. They will be needed in the re-building of the war-torn countries and Palfrey must lead them to safety. This action packed adventure follows the team's progress as they proceed from the Baltic to the very heart of the enemy's stronghold: Berlin.