Two young men, one shy and one self-confident, spend a fast-paced night in Paris trying to pick up chicks. They confront every possible difficulty

The Count De Rochambeau wants to marry Mireille but she likes Etienne. The sister of Etienne, nicknamed "the girl with buttons" schemed with a friend to pose as a Russian princess to seduce the count and allow the marriage of his brother with Mireille.

Naturally optimistic and mischievous, Jérôme Aubin crossed the time of his adolescence, around 1945, with ease and good humor. The years passed. He married the pretty Françoise, a little neighbor he had known since the age of eight, and soon found himself a secondary school teacher, a little anxious at the thought of facing for the first time students he had been told were particularly turbulent. How will he master this new difficulty? Better than you'd think, thanks to a delicious optimism: boldly going against the grain of conventional methods, he surprises his young audience, thwarting the plans of the dissipated gossips and turning their most tendentious attitudes to his advantage. All this provokes astonishment and concern among the college's leaders. But Jérôme Aubin is no pushover, and even the dreaded general supervisor finds himself obliged to give in to his most audacious initiatives...

The marchioness of Botarin secretly exchanges passionate letters with Jean, a young sailor. What Jean doesn't know is that the lady of his heart is twice as old as he thinks, for the photo she has sent her was one of her young niece Jacqueline, instead of her. Things get complicated when Jean turns up at the Botarin manor, escorted by two other sailors. The young man immediately falls under the spell of Jacqueline, which drives the marchioness crazy. The latter resorts to various subterfuges to separate the lovebirds, but to no avail. She will end up marrying a gendarme who has been her suitor for years while Jean weds his beloved Jacqueline.

Martine is a young woman plagued both by poverty and by uncaring, problem parents who in no way can provide the kind of nurturing that Martine needs during her adolescent years. As a result of her family situation, Martine runs away from home and gets involved with a group of teens and young adults from the wrong side of the moral tracks.

Bob recruits Jacques, a desperate blacksmith, to "recover" smuggled diamonds from de Belar. The heist goes badly wrong. The crooks kill each other for the money, but the diamonds are gone and Jacques returns to his life as an honest man.