 A millionaire s being threatened with a lawsuit by a man he did business with. And at the same time his mercenary of a wife has been having an affair. Now she can t divorce her husband because of a pre-nuptial agreement. So, instead of killing her husband, they conspire to kill the man who is suing her husband and framing her husband. And it turns out that her lover is the pathologist whom Lt. Columbo is working with.