Meet Lale Sokolov, the man who held onto a dark secret for over 50 years - the fact that he was the Tattooist of Auschwitz. After spending three years recording his story, author Heather Morris shares the harrowing tale of how Lale tattooed serial numbers onto the arms of those in the concentration camp. With fears of being seen as a Nazi collaborator, it wasn't until after his wife's death that Lale finally revealed his story, one of love and survival.