Brazilian singer Mônica Passos on stage in Paris. In her small apartment she prepares a meal. In the studio she records the song "Itaipu". She speaks of her rebellion against the power plant, that harms nature. In a park, he sings "Itaipu". His powerful voice reproduces bird sounds. She throws stones into the water, creating a visual analogy with sound waves. With her guitarist husband she walks, playfully, away from the camera.