Two sisters live in the same house with their husbands in bedrooms separated by a single wall. One of the sisters, Lígia, is still a virgin. Dissatisfied, she wants to dissolve the marriage and thinks about suicide. To prevent her sister’s suicide, Guida offers her own husband, Paulo, for one night.
![A Serpente](https://image.tmdb.org/t/p/w342/cHGi00N3xCnO956QyAlHYWoZow9.jpg)