Nazi-occupied Amsterdam. Otto Frank and his family have decided to go into hiding due to the increasing persecutions against Jews. Businessman Kraler and his assistant Miep prepare a hiding place in the attic rooms above their place of business. They arrange for the Frank and Van Daan families to stay there. Later on, they are joined by the dentist Dussel. Anne Frank is Otto's 13-year-old daughter. She writes about the remarkable account of their lives, their growing fear of discovery, their deplorable living conditions and even the blooming of her first love. Together, they try to avoid detection while hoping that Holland will be liberated by the Allies.