The voices in his head were screaming again. It seemed like the voices were always screaming... until he killed somebody and then the voices were silent, at peace. And then he could sleep. Brian Prescott is a well educated man descended from honest and honorable parents. His twin sister Bonnie is a model of virtue. What is it that makes him different? The evil twin? Along the way to earning his degree in marine biology Brian discovered that the ever dangerous bull sharks thrive wonderfully in fresh water environments. Now that he has inherited his deceased grandparents secluded waterfront home on one of the bays of Lake Huron, he sees a golden opportunity to put his education to good use. A summer festival in a nearby town will bring thousands of people to the sugar sand beaches seeking to cool their bodies in the clear and friendly waters of the Great Lakes. Brian wonders what a group of hungry bull sharks might do when tempted with so many choices. Could a twin's premonition stop him?