As a young child, Marta (Selma Egrei) witnesses her father commit suicide after being financially ruined and betrayed by his business partner, Humberto, leaving Marta and her mother in extreme poverty. Twenty years later, Marta devises a cold, methodical plot for vengeance. Feigning total blindness, she gains Humberto's sympathy and gets invited to stay at his family's rural estate in São Paulo. Once inside the household, she uses seduction, manipulation, and physical intimacy as her primary weapons—systematically destroying the family from within by seducing various family members and exposing their deepest hypocrisies and secrets.