Thessaloniki, Greece, 1917: As Dimitri Komninos is born, a fire sweeps through the thriving multicultural city where Christians, Jews, and Muslims live side by side. It is the first of many catastrophic events that will forever change this place and its people. Five years later, as the Turkish army pushes west through Asia Minor, young Katerina loses her mother in the crowd of refugees clambering for boats to Greece. Landing in Thessaloniki's harbor, she is at the mercy of strangers in an unknown city. For the next eighty years, the lives of Dimitri and Katerina will be entwined with each other and—through Nazi occupation, civil war, persecution, and economic collapse—with the story of their homeland.

Thessaloniki, Greece, 2007: A young Anglo-Greek hears his grandparents' remarkable story for the first time and understands he has a decision to make. For decades, Dimitri and Katerina have looked after the treasures of those who have been forced from their beloved city. Should he stay and become their new custodian?