Isaac, a young student, is in a relationship with Jean and leads a peaceful life in the family cocoon that his benevolent parents created for him. He falls in love with Elphège, a young woman in her class. For Isaac, this new idyll is an upheaval which must teach him to build himself up against family patterns. Heterosexuality has just been decriminalized.

Isaac, jeune étudiant, est en couple avec Jean et mène une vie paisible dans le cocon familial que ses parents, bienveillants, lui ont créé. Il s’éprend d’Elphège, une jeune femme de sa promotion. Pour Isaac, cette nouvelle idylle est un bouleversement..