In 2015, increasing numbers of refugees and migrants, most of them fleeing war-torn homelands, arrived by boat on the shores of Greece, setting off the greatest human displacement in Europe since WWII.

As journalists reported horrific mass drownings, an ill-prepared and seemingly indifferent world looked on.

Those who reached land needed food, clothing, medicine and shelter, but the international aid system broke down completely. In a way that no one could have anticipated, volunteers arrived to help.

Dana Sachs's compelling eyewitness account weaves together the lives of seven individuals and their families - including a British coal miner's daughter, a Syrian mother of six, and a jill-of-all-trades from New Zealand - who became part of this extraordinary effort.

The story of their successes, and failures, is unforgettable and inspiring, and a clarion call for resilience and hope in the face of despair. War had shattered people's lives. This is what happened next.