When Phoebe Rivers, former pupil Felicity River's daughter is sent to Malory Towers, she doesn't know quite what to think of the school. She doesn't like the idea of a boarding school, and wants to go to St Clare's, the secondary school in her local area where all her friends will go. However, she settles down and meets a few friends, who are just as nervous as her. Friendships are tested, though, when the girls in her dormitory, one by one, has items stolen. Which of the seemingly friendly school girls can be the thief? Read on to find out...