June 1942. WWII Amsterdam is under Nazi occupation. Anne Frank, a teenage Jewish girl, is celebrating her 13th birthday with her family and friends by having a party. Amongst her birthday presents, she is given a red diary that she starts to write in immediately. Days later, call up papers arrive for her 16-year-old sister Margot and her parents, Otto and Edith, decide to hasten their plan to go into hiding from the Nazis to ensure that the family do not get separated.

The next morning, the Franks head to Otto's spice company. Once there, they are led past the warehouses by their helpers in the office and taken up to a secret annex at the back of the building that occupies the three top floors. Otto and Edith will sleep in one room, with Margot and Anne next door in another. They will soon be joined by their friends Mr and Mrs Van Daan and their teenage son Peter, who will live on the floor above, in the larger shared living area. At the very top of the building is a disused attic, too cold to sleep in but useful for storing food. They must obey strict rules in the annex, remaining completely silent during working hours while the warehouse men are in the building. Only the faithful office staff know of their existence and have agreed to help them survive.

At first, Edith and Margot find the confinement hard to bear and sink into depression, while Otto and Anne make themselves useful, arranging the furniture that has been hidden there for them, and sewing material together to make black-out curtains. The Van Daans soon arrive and liven things up, especially when Peter reveals that he has brought his pet cat Mouschi, while Anne was forced to leave her cat at home. Anne does not think much of Peter but decides she must try and be pleasant to him to keep the peace. Show less