It is the Christmas Term, and Peggy Bettany is excited about the coming term, her first in the Sixth. While traveling to school, and making a transfer between trains, Peggy and her family get on the wrong train, resulting in their arrival at school a day late.
This book also introduces two new girls, Polly and Lala Winterton 15 and 14 years old respectively. They had grown up in a rather unsupervised environment while their father, a journalist, was away of assignment in the Far East for ten years. Upon his return, he was shocked to find that his girls were "lazy, impudent, and disobedient."
He decides to take action by moving the family to a new home, away from the Pennine Moors and to a place where they would grow up in a more controlled environment. He also resolved to send to good school rather than continuing with a tutor. The Winterton's new home is near the Quadrant, home to the Bettany's, where the Winterton's first learn of the Chalet School.
Much to her surprise, upon Peggy's arrival at school, she learns that she has been selected as the new Head Girl. Many of the prefects from last year have left school or have been promoted to the Special Sixth. After a very bad experience with one Marilyn Evans two years earlier, the heads have decided that no member of the Special Sixth can be a prefect.
Peggy's peers are delighted with her appointment as Head Girl and rally around to support her. One of the Special Sixth, Eilunedd Vaughn is acting in a strange manner - challenging Peggy constantly. What is wrong with Eilunedd?
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giving everything away!