On Christmas Eve, Alejandro and Aurora break into what seems an abandoned house on the outskirts of Santiago. The property actually belonged to Aurora's father, who died unexpectedly several months earlier, and has since been sold. Before the new owners take possession of the house, Aurora wants to return one last time in search of childhood memories.
The two teenagers decide to spend Christmas Eve there, away from their respective families. But all too quickly, Alejandro's existential frustrations and Aurora's doubts about her sexual identity cause the pair to argue. Alejandro, who suspects that Aurora is having a relationship with one of his female friends, decides to return to Santiago. But when he leaves the house, he discovers an unconscious girl in the garden. Fifteen-year-old Alicia, a fragile, diabetic girl has run away from home. Alejandro and Aurora forget their differences to take care of the young runaway and to try to understand her distress.
While the city celebrates Christmas, the teenagers reveal themselves, confront their doubts, and try to escape their loneliness. As they draw closer together, a mutual attraction grows between them that leads them to live a singular amorous episode. After this night of initiation, they will find the strength to face up to their destiny.