The sheltered Oxford-raised, quiet and reserved young Jennifer Silver journeys to the High Pyrenees in search of her half-French cousin who has been recuperating in a convent. A WWII-wounded former student of her professor father and brilliant musician follows her there for his own personal reasons. Just as they are rejoined, they become caught up in intricate webs of danger and criminal intrigue.
From the back cover- "She had come to the convent - a brooding cluster of ancient buildings nestled deep in the wild upper reaches of the French Pyrenees - to find her young cousin, Gillian. But the Convent of Our Lady of the Storms was not like others. There was something strange and frightening about the place...something that gave off an aura of evil, of hidden, violent things...
They told her Gillian was dead, but she did not believe them. Searching for the truth meant trouble. She did not know, until too late, it also meant ...murder."
As always, Mary Stewart's settings are so spectacular and described in such detail that I can see, smell and touch as clearly as if I were there as well. It is because of this superb sense of detail that a half dozen reads may not even be enough.