Ally Sheedy and Matthew Broderick, a couple of kids, become involved in something that is far beyond them. Broderick, who knows computers (in1983), inadvertently gets into a game (or so he thinks) of Thermonuclear War. It turns out that he has actually hacked into a military program that is feeding the U.S. information about that very subject. It's not a game as he thought it was but he also realizes what is happening. Now the problem is that he needs to convince someone what is going on, and they, then, have to put a stop to it. Think what little effect the computer world had in those days and realize how dangerous they have become. Good chemistry by two future stars.