But when, as a teenager in 1919, her life is suddenly turned upside-down, she is catapulted into a new and extraordinary life - as a secretary, a scientist, a sister and a spy. From racist gangs in Berlin to gangsters in New York City, Nazis in the 1930s and Hitler's inner circle during the Second World War, Hanna will encounter some of history's greatest minds and most terrible moments, all while desperately trying to stay alive. She is a most unique secretary and she will work for many bosses - from shrewd businessmen to vile Nazis, to the greatest boss of them all, Mr Albert Einstein...