Anne Frank, a young Jewish girl, and her family are forced into hiding during the Nazi occupation of the Netherlands. They reside in a secret annex within Otto Frank's office building, joined by the van Pels family and Fritz Pfeffer. Anne documents her experiences, emotions, and aspirations in her diary, addressing it to an imaginary friend named Kitty. In 1944, the annex is discovered, and the inhabitants are sent to concentration camps. Anne and her sister Margot perish in Bergen-Belsen, while their father Otto survives and later publishes Anne's diary, which becomes a symbol of hope and resilience amidst the horrors of the Holocaust.