Four brazen, young girls spend a weekend by themselves in a family country house, with a digital portable video camera.
Elena, pretty seventeen years old, gives the title to the story, since she was born in 1983. Her parents, with which she has an excellent relationship, are the owners of the house in the county; Martina, the anti-conformist of the group, has no hang-ups whatsoever; Claudia, the only one who has turned eighteen and has a car; and Betta, the girl "with a head on her shoulders", but who suddenly falls asleep anywhere.
The combined moments of comedy, small tragedies, real and unreal love encounters, go-kart races and rides in automobiles of the past, will overturn the lives of the four girls forever.
They start out by playing "grownups" and find themselves to have become just that… and there is no turning back.