It's all so exciting - Jo, Grizel and Robin are to spend the end of their Christmas holidays travelling with Miss Maynard in Switzerland. And when they return to the Chalet School, Grizel is going to be head girl!

But Grizel starts to act in a very strange manner. Early one morning she goes off alone on a sightseeing trip - completely disobeying Miss Maynard. A very odd way for the future head girl of the Chalet School to behave!