It is the Chalet School's 21st anniversary, and the whole school is excited at the thought of all the celebrations that were to take place, not to mention their reunion with a good many acquaintances. The school is also to take it in turn to visit the Tyrol, and here Prudence Dawbarn misbehaves herself and comes within an inch of missing this great treat.
There is still the Sale to prepare for, and indeed the school tries to make it a record one. As the St. Mildred's crew is also present, they are co-opted into helping out not only in the Sale but also in games challenges. Their Sale is a huge success.
The prefects are thrilled to find that Joey Maynard and her three chums, Frieda von Ahlen, Simone de Bersac and Marie von und zu Wertheim, are to escort them to the Tiernsee. A pleasant time of reminiscing followed. The girls were shown the site of the original school building, the Dripping Rock, the Sonnalpe as well as lesser places. Mary-Lou and Joey fall headlong into a wild adventure that scares everybody.
Mary-Lou Trelawney gets a pleasant surprise from the Head and the term ends with Sports Day, where the Josephine Maynard Prize is awarded.
If you want to find out more, click on Spoilers
As the link suggests, it gives more of the story - without, of course
giving everything away!