I hate sneaks worse than anything. If you dare tell tales again, I'll make you very sorry.
Trouble explodes in St Clare's when holier-than-thou Prudence joins the first form. The pupils hate her sneaky ways, but some of the teachers adore her. Determined to win the approval of all, Prudence sets out to reveal the secret past of new girl, Carlotta. Will her nasty little scheme succeed . . .?