After their father died and their mother left them for a life in Spain with her Spanish lover, the Tanguay siblings were understandably perturbed. To protect their younger sister Isabelle (Fanny Mallette) from the truth, sisters Catherine (Marina Orsini) and Martine (Celine Bonnier) and brother Luc (Stephane Demers) told Isabelle that their mother had died. Unfortunately, twenty years later, the repercussions of this lie are all too apparent: Isabelle, now 25, has the emotional maturity of an 11-year-old, and harbors a grudge against the world and Catherine -- now a schoolteacher -- in particular. When Isabelle persuades Martine and Luc to visit her and Catherine in the Quebec village where they live, the return of the two siblings -- one an angry lesbian, the other an angst-ridden writer -- gives rise to full-fledged chaos first sparked two decades earlier.