In 1942, Gestapo agents knocked on the door of the Lewyn family. Bert Lewyn was a teenager, only 18 years old. Like thousands of other Jewish families, Bert, his mother and father were all arrested and taken away. His parents were deported to a concentration camp and Bert was conscripted as a slave laborer, forced to work in a weapons factory building machine guns for the German Wehrmacht. This is the story of Berts escape and subsequent struggle to survive on his own, living underground in Nazi Berlin.