Two sisters, Silvia and Susanna, are divided by a deep conflict. Susanna, considered unstable but convinced of her own clarity, accuses Silvia of having an incestuous relationship with their father, shattering the family's balance. Her provocative and violent actions make her socially dangerous and force her to disappear. Meanwhile, her accusations contaminate everyone's relationships, leaving behind an ambiguous reality in which the truth appears painful and uncertain.