It's the 4th of July| and America is celebrating. But when a hostile force attacks from both outer space and within Earth itself| our planet may be on the menu for aholiday barbecue. Can a small-town fireman| a physics-loving teen| a rogue scientist| a pair of nerd hackers and the stranded President Of The United States now finda way to stop the invasion| nuke the alien mothership| and set off the biggest fireworks display of all?