When human rights lawyer Philippe Sands received an invitation to deliver a lecture in the western Ukrainian city of Lviv, he began to uncover a series of extraordinary historical coincidences. It set him on a quest that would take him halfway around the world in an exploration of the origins of international law and the pursuit of his own secret family history, beginning and ending with the last day of the Nuremberg Trials. Part historical detective story, part family history, part legal thriller, Philippe Sands guides us between past and present as several interconnected stories unfold in parallel.