Jessie and her best friends in boarding school have always loved their teacher, Miss Müller. Half-German and half-Irish, she's as beautiful as a movie star. But ever since their country, Ireland, went to war with Germany, they don't feel the same way. In fact, the girls now think there's something very strange about Miss Müller.
One night Jessie sees Miss Müller walking by herself in a part of the dorm that is off limits. When she tells her friends, they get really suspicious. But they will soon find out that appearances can be deceiving--and that judging someone can be downright dangerous. . . .