Maria and Sergio are schoolmates but they have never talked to each other. Coming back from the summer vacation Maria is noticed by Cristian, a boy of whom she is madly infatuated with. Cristian sends Sergio to talk to her asking if she wants to be with Christian. It is a very sharp proposal but the girl in front of her idol says yes, except that she has no sexual experience, has no idea about what will happen or what to do.

Over the course of a day in September, three loosely related people realize their life is not the one they dreamt of.