The School has reconvened for the Christmas term following the adventures described in THE CHALET GIRLS IN CAMP. As usual, there are several new girls, including a Prussian by the name of Thekla von Stift, a cousin of the school beauty, Marie von Eschenau.
Thekla proves to be very unlike her cousin, and causes problems in the school. As a member of the Junker class, she considers herself to be socially above most of the other pupils. Despite the school's reputation for making even the most difficult girl fit in, Thekla has no wish to do so. Her behaviour not only enrages her form mates - who include Maria Marani, Margia Stevens and Evadne Lannis - but on one occasion she also gets them into trouble by "telling tales" against them.
Even an accident on the Staff Evening, which has a Halloween theme, fails to make Thekla a "real" Chalet girl, although it does bring her slightly more into the fold. In the end, she even has a part in the School's Christmas play - but the question remains as to how deep her loyalty and commitment to the school goes.
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As the link suggests, it gives more of the story - without, of course
giving everything away!