Up until the 50-60s in France, young girls aged from 12 to 21, known as ''Lost girls'', were locked up in extremely tough juvenile detention centers run by nuns. There were more than 100 of these establishments across France.

France in the fifties. The teenage orphan Sylvie is put in an institution for "fallen" or endangered girls, subjected to harsh treatment by the bigoted nuns who run the institution like a prison. Sylvie befriends a girl who wants to escape.—fa404748 Belgium

Up until the 50-60s in France, young girls aged from 12 to 21, known as ''Lost girls'', were locked up in extremely tough juvenile detention centers run by nuns, called ''Le Bon Pasteur'', ''The Good Shepherd''. There were more than 100 of these establishments across France. Similar centers also existed in Ireland and Canada until 1984. This film aims to reveal this social phenomenon and pay tribute to the several thousands of girls concerned.—Happy_Evil_Dude