It is the summer of 2007. The sun is shining, music isdancing on the air, and kids are playing in the streets. What they don't know,though, is that slug-like creatures have come to Earth in flying saucers,attacking the world and its people. By attaching themselves to people's backsand taking control of their nervous systems, the slug's use humans as puppetswith the intention of taking over the whole world. Earth is quietly thrown intochaos--but a few special agents could save them all.

Sam, Mary, and The Old Man--the head of the clandestinenational security agency called the Section--travel to Iowa to investigate areport involving a flying saucer as well as the disappearance of six agentspreviously on the case. Learning that the city is being overrun by slugs, theyare disheartened to learn that they can't convince the US President toofficially declare an emergency.

The three are attacked but manage to escape. However, a slugis able to escape with them. The situation becomes more dire when Sam getstaken over and the slug starts using Sam's vast skills and knowledge tofacilitate the invasion.

Is this the beginning of the end for the human race?