The film takes place in the near future, where an alien race has invaded the Earth and defeated the world's military units.
It's only telling that aliens or mimics invaded earth. But I can't remember from the movie that it explained why they come to earth? And who they are! Or why they want war? What they want from earth? Are those only soldier aliens or entire alien race is here on earth! None of these are explained in the movie or may be I missed it.
I haven't read the book All You Need Is Kill And the questions are not cleared either in the wiki page of All You Need Is Kill Can anybody tell me if anywhere 'origin of those mimics' are mentioned? Where they come from? And why?