Ten young people (six boys and four girls), most of whom students, rent a house in bad repair and set about living together. The experience is not obvious and the ten tenants have to cope with more than one difficulty. But they also have their moments. Things really go awry when Françoise, an unmarried girl, is forced to deliver the baby she carries prematurely and when Solange, the lonely girl of the group, attempts suicide. Shortly afterwards, the group learns that the house is due for demolition. They decide to take advantage of this opportunity to face adult life individually.

Un jeune étudiant en médecine cherche à se loger. Au cours de ses recherches, il rencontre un jeune débrouillard qui lui indique un vaste pavillon un peu délabré, dans le quartier du Ranelagh, en location pour 1.500 F par mois. L'affaire parait tentante mais évidemment les deux amis ont besoin de huit autres locataires pour partager les frais. Très vite, ceux-ci sont recrutés.