St Trinian's is a film series based on a series of cartoons by Ronald Searle (who also was responsible for the Molesworth books and Dick Deadeye, or Duty Done). The films are set in a disreputable girls' school where the only rule is that there are no rules. The girls themselves are teen and pre-teen horrors who are not above using their feminine wiles to get away with murder. The teachers? They're no use, instead teaching the girls how to get away with crime in foreign countries and mixing drinks. The headmistress, Miss Fritton, has no interest in maintaining any form of order. And there's a local spiv, Flash Harry, who makes money from whatever schemes the girls cook up (usually).