Estelle, 34, wife and mother of the family without history, sinks into a tidy, predictable life. But a series of events puts her identity in question. Worse, she realizes that the crux of the crisis is sexual. She decides to organize a "threesome". Challenge away from his comfort zone. She plunges into this mad quest, resulting with her spouse who feels just as incompetent.

In 1963, the Faubourg district in M'lasse was destroyed for the construction of the Radio-Canada tower. A photographer was then hired to immortalize the neighborhood. Halfway between documentary and fiction, Au pied du mur takes up this premise and updates it. The film follows a city employee entering the privacy of the people of a Montreal neighborhood in order to capture one last time what will soon have to be destroyed.