One summer morning, Cleo's little sister drowns in the family's pool, leaving her and her mother to cope with an unthinkable tragedy. Soon after, Cleo’s aunt arrives with her three cousins Leoncia, Manuela and Nerina, to comfort the family as they grieve and care for her mother, who rapidly descends into a deep depression.

This unexpected change in familial dynamics leads Cleo, along with her cousins, to immerse themselves in the feminine world of childhood, just as perverse as death itself. The fear of not having their first kiss, the fear of being alone forever, the fear of menstruation, and surrendering to a body that is no longer theirs, the girls are thrust into the irreversible change of maturity.