Kids on a family vacation must fight off an attack by knee-high alien invaders with world-destroying ambitions. At the same time, the youngsters work hard to keep their parents in the dark about the battle upstairs. It all starts as a meteor shower rockets across the dark galaxy. Four glowing pods sparkle and crackle while hiding behind the meteor show. A mysterious force makes the meteor shower turn a hard right towards a bright blue ball in the distance - planet Earth.