The episode begins when Geraldo announces his marriage to Dagmar, the daughter of a colonel. During the engagement party, Dagmar draws Geraldo's attention to her sister Alice. Geraldo starts paying attention to his future sister-in-law, who is becoming a woman. Alice begins to seduce Geraldo and the couple starts having shady meetings. In one of these encounters, Geraldo takes an extreme attitude and Dagmar has a surprising reaction, followed by an unexpected revelation from her mother.