Catherine lives in the town of Nervy-Sir-Barangeon, where she works at a bar called 'The Edge of the World', with her best friend Marie. One February day, Cathy makes the acquaintance of her new neighbor, Joel. Together, they go to hear Sexy Sushi, a band that seems to turn listeners into lunatics. That evening, an improvised house party takes place at Cathy's. But, before long, the party turns into a nightmare.