Woman in darkness

A few days before dying in an accident, Guillermo confesses to his friend Eusebio that he is having a sadomasochistic relationship with a mysterious woman.

Some time later, Eusebio looks for her to give her the news that Guillermo has died, and that she will never see him again.

However, when he finds her it is love at first sight, and he decides not to tell her what he knows.

Eusebio expects her to abuse him and humiliate him sexually as she had done with Guillermo, but Julia only gives him tender caresses.

Here stems the insidious doubt that will hover over Eusebio: Is the woman who beat his friend with a riding crop and the woman who embraces him so tenderly really the same person?