Mario becomes more involved in Diana's life, which arouses Irene's jealousy. Diana finds evidence of something beyond her suspicions.

Diana decides to go deeper into her studies with Joaquín to understand what is happening to him. Malena struggles with her ideas about motherhood. Mario doubts his relationship with Irene.

Diana and Joaquín set out to find evidence to support their theories. Malena confronts her decision to become a mother. Diana opens up to Mario and they have a rapprochement that neither of them would have expected.