Two eleven-year-old boys, a stick and some broken teeth are the catalyst in this tale of two families. Veronica, a writer, and Michel, a company wholesaler, are parents to Bruno. Annette, a wealth manager, and Alan, a lawyer, are parents to Ferdinand. The two couples meet to discuss the misdemeanours of their sons.
The evening begins quite amicably, with apple and pear dafoutis, and the four parents intending to resolve the situation diplomatically. However, as their hopes for this begin to splinter and disillusionment sets in, the evening deteriorates from one of mild unease and discomfort, into a deluge of accusations, recrimations, jealousy and rage.
Boys will be boys, but can the grown-ups be grown up enough to resolve their differences without losing sight of right and wrong? The facade of civility shatters as the God of Carnage wreaks havoc in the living room and all hell breaks loose.