Having flown away from her unfaithful husband, Sophie has found shelter at Marchioness Foscari's home. There, she meets Halmeyda, an Argentina noble she falls in love with. Unfortunately, she is married. Then, the Marchioness proposes her a strange deal. She will take care of "sweeping out" Sohie's husband. In return, Sophie will have to kill the Marchioness' sister who wallows in shameless lust and tries to harm her by all means.