1938. A perfect summer on the Greek island of Lefkas for three young people untroubled by the simmering politics of Europe. Peter, visiting from Germany while his father leads an archaeological dig, has become close friends with locals Andreas and Eleni. As the world slides towards conflict and Peter is forced to leave, they swear to meet again. 1943: Andreas and Eleni have joined the partisan forces resisting the German invasion. Peter has returned - now a dangerously well-informed enemy intelligence officer. A friendship formed in peace will turn into a desperate battle between enemies sworn to sacrifice everything for the countries that they love...