Danielle has brought a baby, belonging to the couple for whom she is an au pair (a nanny), to the school. Her employees are out for the evening and she doesn't want to miss her lesson.
While a number of her classmates have arrived early to catch up on homework and are together in the canteen, Danielle arrives with a pram containing a baby boy. At first they think it is hers then she explains her situation and expresses her intention to take the baby into class with her.
Gladys, the canteen assistant, dissuades Danielle by warning her that it is against the rules and that Miss Courtney (the Principal) would be furious if she knew. Gladys offers to take care of the baby until class concludes and Danielle leaves the baby, in the pram, with her.
In traditional style (a la Marx Brothers) the baby appears and disappears as the school is thrown into uproar.