Penelope , a nineteen- year- old girl,is bored stiff in the boarding-school where her mother wants her to stay one more year.During a trip to Paris,Penelope gives the slip to the supervisors and makes acquaintance with Antoine ,a young superintendent: she spends the night in his place.The young man, realizing he is dealing with an ingenue ,tries to get rid of her.But she does not want to leave him and,to make the matters worse,the headmistress of the boarding-school accuses Antoine of corruption of a minor.