Margarita, 13 years old and an introverted outsider at school, observes the beautiful Ariana on a school trip. All the boys want to be near Ariana, and all the girls want to be like her. Margarita is also fascinated by Ariana and a secret friendship develops between the two very different girls. But then Margarita observes how the crush on Ariana can get out of control and a dark secret is imposed on the class community. Margarita is faced with a conflict of conscience for which there seems to be no solution.