Fantômas is a man of many disguises. He uses maquillage as a weapon. He can impersonate anyone using an array of masks and can create endless confusion by constantly changing his appearance.
Gaston Lachaille é o solteiro mais cobiçado de Paris, sendo rico, bonito, bem vestido e com vários criados ao seu dispor. Gigi é uma jovem irrequieta, que recebe aulas de sua tia Alicia para se tornar uma dama da aristocracia. Eles são amigos, até que Gaston começa a se sentir atraído por Gigi.
A beautiful and sophisticated teenager is placed in a regimented French girls' boarding school after her father apparently commits suicide over a business scandal. She immediately gains admirers -- a lustful middle-aged artist, a handsome young composer, a fellow female student -- as well as a jealous rival. With the help of her schoolmates, she attempts to elope with the composer, but the adults catch on to the plot, and she is locked into her room at night.