After thirteen years of engagement, the boring sex life of Rui and Vani is limited to one intercourse every other week. They decide to seek excitement with a threesome and they decide to invite Vani's cousin Silvinha to participate late night, but an accident interrupts their game. Rui and Vani unsuccessfully spend the night searching for for companion of a bisexual woman.
In Rio de Janeiro, the forty and something years old Mercedes (Lília Cabral) goes to the psychoanalyst and tells the story of her life since she was a girl and lost her mother. Along the three years of analysis, her life changes and she divorces from her husband Gustavo (José Mayer) and has love affairs with the younger Theo (Reynaldo Gianecchini)
The publicist Claudio and the housewife and choral teacher Helena have been married for many years, but they do not understand and respect the feelings and view point of the partner. Claudio sees Helena as a shopper and "little teacher of a choral" and Helena sees Claudio as an insensitive and rough man. On the night before the fiftieth anniversary of Claudio, they changed places with each other.
