What should Mimi do with the blank piece of paper that her father hands her? »But there is nothing on it,« complains Mimi. Then the two of them discover much more than just a story.

Mimi is supposed to be practising piano, but she is bored. She is listlessly tinkers away – when suddenly a boy in strange clothes and a white wig walks out of the piano. He plays piano like a virtuoso, never looking at the notes, and never making a single mistake …

Once again, Mimi's bedroom is in a state of chaos, but Mimi does not want to tidy up. Faced with her mother's impatience, Mimi begins to curse – and soon discovers that swearwords can have a very peculiar effect…

With a pair of tights wound around her head, a sweater tied around her belly and golden sandals on her feet, Mimi rings at the door of her parents' home and tells her astonished mother that she is not Mimi today but Anne Other. As Anne Other, she does everything quite differently: she drinks her cacao without a fuss because milk is good for her bones, she cannot bear strawberry jam, which Mimi loves, and she allows Mrs Müller to tie her shoelaces because she cannot do it as well as Mimi. And then she tells Mimi's parents the terrible secret that has been concealed beneath Mimi's pillow for days…