It's the middle of the night at the Anne Frank House in Amsterdam, and a thunderbolt has just shattered the protective glass case in which the most famous diary in history is displayed. Magically, Anne's imaginary friend, Kitty, comes to life.

When Kitty learns that Anne and her beloved sister Margot have died in the war,
she runs away from the house and follows the sisters' path, recounting the complete story of Anne Frank's life, family, and diary from her own unique perspective. In the present day, Kitty's adventures bring her in contact with the refugee crisis in Europe, from which she discovers the true meaning of Anne Frank's legacy.