In this book Felicity, Susan, June, Bonnie, Amy, Freddie, Lucy, Pam and etc are in their last term at Malory Towers as sixth formers. Gwendoline Mary Lacey is back as a teacher to teach the sixth form how to become a lady.
The new girl is Lizzy who moved up from the fifth due to being advanced at her studies. She has a sister, Edith, in the first form who becomes close friends to cheeky Daffy Hope (Sally's little sister). Lizzy does not like this and tries to spoil the fun for her sister. It is not a Malory Towers book without some spite. Someone is out to get Gwendoline and doing spiteful things to her.
Felicity: Head girl
June: Sports Captain
Teacher: Miss Oakes