Agustina (15) moves to a small town with her mother. There, she will meet Pedro (15), a boy who does not attract the girls but who has a mind of his own; he will not wear hair gel or change his bike for a motorcycle just to catch their attention. Pedro falls in love with Agustina instantly. He is set on winning her over, no matter how difficult it may prove to be. Agustina, shy and introverted, warns him that she has decided to have no boyfriends but Pedro, who is ready to wait for her and control this love, agrees to being just friends. In the midst of their friendship, she confesses to a slight trauma that prevents her from succumbing to the experience of first love. Pedro, who is prepared to do just anything, visits the gynecologist in order to preserve her secret in a town where everybody knows everything. Meanwhile at school, with the exception of Agustina, everyone seems to be an expert on matters concerning sex, and everybody is worth his or her sexual conquests.