It starts with "Save the Cheerleader, Save the World," but soon spirals into a never ending battle for right and wrong, life and death. As people across the U.S. discover and use their special abilities in this NBC hit series, their world and lives are turned upside down as a serial killer named Sylar tries to hunt them all and make sure no one becomes as powerful as him. But it's not so simple. Sylar isn't in control of his hunger for power. Nobody knows when he will strike, or change, or strengthen. Unpredictable is this new world of heroes. And as time goes by, they each learn what the can do for the world. And it's not always good.