The Age of Man has ended. The machines he has created and his animals have risen up against him. A surviving band of high school students and two teachers return from a field trip to find their devastated town overrun with new owners who are out to see the last humans erased from the face of the Earth. The struggle for survival ensues. News, weapons, allies: all needed in hopes of seeing another tomorrow. Opposing them is a gathering army of animals and machines with only one though in mind: Conquest.