Darrell and her friends once more return to Malory Towers and are in their third year at North Tower. Three new girls turn out to be really exciting this term. Zeralda an American girl who is into film stars and thinks she can act as well as her screen idol. Bill short for Wilhelmina, who is mad on horses and thinks of nothing else. And Mavis who has a lovely singing voice and is desperate to be an opera singer. Darrell's third term is full of laughter, fun and quite a few surprises.