Every week, Frederique and Luna receive a letter from their mother who has been away for several months. Their little world comes crashing down when one of them starts acting strangely and a distant family member visits them.

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.

Jean-Charles has an unusual relationship with his mother. He can't break free of her influence even when writing his master's thesis, made up of interviews with the several hundred men who have slept with her. Jean-Charles can identify -- he's one of them. But the incestuous bond between mom-and-son is jeopardized when Jean-Charles meets Cassandra, and Mom shifts her attentions to a hot young stud in retaliation.

Two allied soldiers stuck in a muddy bomb hole. Two men in desperate need of their humanity. Only one will come out alive of this mess.