The Z- Transform

A family man having a wife and cute daughter, an insurance agent by profession in a multinational company, James McCoy believes in science. From falling of an apple to escape velocity, James is a firm believer that scientific theories has everything to explain. And other than what cannot be explained by science, are all only myths and false theories generated by Human being to satisfy their needs. But when an invited guest turned out to be the wrong guy, the entire earth is in danger of extinction. Can McCoy stop this enemy using his wits and theories of science in saving his family and home or will join those who believes that scientific theories have its limitation and they cannot explain everything.