A new school year begins at the High School Argentina (HSA), and the students return from the summer vacations. Fer, the captain of the school rugby team, the Jaguars, discovers that Agus, his neighbour and classmate, has changed a lot over the summer. Delfi, however, continues being vain and wastes her time dominating her poor brother, Walter, and her associates Alicia, Clara and Valeria, or, as she prefers to call them, "The Invisibles".