Over 30 million people have read The Diary of a Young Girl, the journal Anne Frank kept while living in an attic with her family in Amsterdam during World War II, until the Nazis arrested them and sent them to a concentration camp. But no one has ever conclusively explained how they managed to live in hiding undetected for over 2 years - and who or what finally brought the Nazis to their door. Utilising methods developed by the FBI, the Cold Case Team painstakingly pieced together the months leading to the infamous arrest - and came to a shocking conclusion. This is the riveting story of their mission. Rosemary Sullivan introduces us to the investigators, explains the behaviour of both the captives and their captors and profiles a group of suspects. All the while, she vividly brings to life wartime Amsterdam: a place where no matter how wealthy, educated, or careful you were, you never knew whom you could trust.