Several years ago, earthlings have faced invasion of their planet alien race, they were very serious about, but underestimated the people who were able to defend their planet. To many people, it was obvious that if aliens exist, and had once tried to seize the land, it’s sure to happen again, the only question in time.
The government has begun actively preparing for defense against alien forces, using their own technology, which remained after the defeat. But no matter how mankind are not ready, they will have a very hard time when attacks happen again, and everyone knew it. And now, a few years after the first invasion, the aliens have returned, but this time they changed their tactics and developed a more effective weapon. In humans, there is practically no chance, but also other choice but to fight to the end, they do not have, because at stake is the whole of humanity, and their only home. Experienced veterans, survivors of the first invasion again take up arms and help them young recruits, which are specially prepared for this battle.