How would you act if Earth- our home- was invaded? What about if the intruders won? What if this all happened in the next century- sooner than anybody expected? How would you feel if their existence killed off all living things- including humans: your family; your friends? If they herded all of the survivors- like animals- into a 'cage', where everything you do is watched? What if you were left there to fend for yourselves- alone and with no freedom- to find food, to make shelter, and just to survive? In this world- all of these things have happened. Now what will you do?