In ‘New Term’, Darrell has left Malory Towers and her sister Felicity takes over as head girl. But the other girls are determined to cause trouble. Will Freddie and June ever stop playing tricks? And what’s Amy’s strange family secret? In ‘Summer Term’, someone has stolen Julie’s horse. And there’s money missing too. Can Felicity and the girls find out who would do such a terrible thing? In ‘Winter Term’, Susan is excited to be in charge of the winter concert, but Miss Tallant, a new teacher, has very strong ideas about it. And when she interferes in a midnight feast, they realise there’s a spy in their midst. But who could it be?