Alicia had fallen or jumped from her apartment window but her sister Nicky believes that Alicia’s husband Guy, had killed her and makes a promise to her dead sister that she will prove it and make him pay for killing her. Guy is also the brother Nicky’s husband hence her brother in law. Nicky hires a private detective and she finds out that Guy had lived in Europe and had been married twice before and both his previous wives had died under mysterious circumstances leaving him with half a million dollars.