Sylvie and Dora start a Facebook group, turn up the volume and wait for the guests to arrive. On the eve of Sylvie’s birthday, the girls dig into the birthday cake, symbol of childhood nostalgia, and wash down its bittersweet taste with the adolescent hedonism of Project X, the 2012 mock cinema verité film that prompted a spate of teen hooliganism and generational Pavlovian response to Kid Cudi’s Pursuit of Happiness.