New girl Darrell is two terms behind her classmates and feels out of place and alone. Soon, however, Darrell makes friends as well as enemies as they induct new students, win and lose sporting matches and play tricks on teachers.
There's a thief about! Purses and jewellery are missing in the North Tower. Meanwhile Darrell is caught in the middle when her friend Sally is made head girl instead of Alicia. Will they find the thief and will Alicia and Sally make up?
There are lots of new students, including sophisticated Zerelda from America. This year, not only the girls face challenges - Bill's poor horse, Thunder, suffers from collic. Will Zerelda and Darrell become friends, and will Thunder survive?