When is Dah Nile more than simply a river in Egypt? For Professor Simpleton, who is trying to teach economics to students who struggle with arithmetic, denial begins when a mysterious, hot new graduate student, Petrina, applies to assist with his economics class. Look a gift horse in the mouth? Not Simpleton. Iconically, Petrina seeks Simpleton's attention and is increasingly honest with him. But Simpleton simply recasts Petrina's murderous proclivities in view of his own desire to get close to her. In the end, tragically he becomes another of her victims.