On 4 August 1944, everyone in the Secret Annex is arrested. Someone has betrayed them. They are deported first to the Westerbork transit camp, and then on to Auschwitz. Otto Frank is the only person from the Secret Annex to survive the camps. The others all die. Hermann van Pels is murdered in the gas chambers, and Auguste is thrown in front of a train during a transport. The others die of disease and exhaustion. The identity of their betrayer has never been established.