In a retirement home for former professional musicians, a newcomer convinces some of his mates to embark on an exciting adventure that will change their lives.

Paula, a thirteen year old girl, starts to experience certain complications in the relationships with her family and friends. In order to be with her ill grandmother, which she barely knows, she spends the summer in Ojos Negros. There she will meet Alicia, a girl her age, who also stays in town for the summer. Together they will venture into the adult world through a stifling summer that never ends.

As the Great Epidemic ravages Europe, governments are struggling to divide the population. The "Fit" are evacuated to the â Capital Cities isolated behind protective walls, while in the outer areas, the "Unsuitable" try to survive on their fate.