Fran (Francisca) lives her seventeen to the fullest, due to her relationship with Hugo, a photographer who doubles her age and appears in front of her eyes in a foggy morning. Later, at the end of the summer, she will share with him a brief period of passion, a experience she knows will be just once-in-a-lifetime, despite the fact he will occasionally send her letters, which will exasperate her but make her yearn for them at the same time.

Racist graffiti appear on a wall at the high school Fran goes to. That provokes Fran and her classmates, who try to figure out how to unmask the offenders. In a given night, when Fran and her gang are hanging out, Aser, the Arab classmate, is brutally assaulted by a group of neo-Nazis.  Unintentionally, Fran finds something important; something that will lead her to risk her own life in investigating the Nazi plot.