But what is the sex of Madame H? This is the question that Rémi and Antoine, bored with their cat in their studette, ask themselves stupidly at the beginning of their new filmed diary. The couple has no idea that Madame H, a mysterious middle-class woman, will lead them on an obsessive quest for the Holy Sex in the course of a very crazy fiction.

A few miles from Paris, on the other side of the northern ring road, stands a ghetto neighborhood with countless rows of dilapidated apartment buildings, their concrete crumbling and iron rusting. A multiracial community has long been rooted here, while most native French families have deserted the area. In tower 216 lives a "model" family of Algerian origin, the Bouamazzas. Our heroine, Aïcha, 25, the eldest daughter, is held up as an example by the whole community. But Aïcha can no longer bear the weight of the community: she wants to spread her wings, gain her independence, and finally cross the Rubicon.