Parasite

Alexis is in history class when an out of this world event happens! A superior, efficient race of aliens takes over the earth in less time than it takes her to brush her teeth. A race with millions of light years more experience then us humans. Everyone around her gets taken away. In moments, streets are deserted and the screams are turned into a horrifying silence. These are sinister creatures with no benefit. These monstrosities suck the life out of an organism and feed on it for their own evil victory... a parasite.