I typically use the IMDB description for a movie at the start of a post. Except in this case. Netflix actually tells you what might happen in the movie.
One night five friends are out drinking, the next they’re struggling to survive in a landscape controlled by alien invaders in this sci-fi chiller. Anarchy is in the air as an enormous spacecraft hovers overhead and order breaks down on the ground. – Netflix
The real “battle” is the insurgence within mankind itself. – IMDB
The movie opens with a woman (Maya Grant) running out of a house in a panic, in the rain. She is looking around scared, and then suddenly looks, and appears to be the on verge of fainting. I’m only 99% sure the purpose of this first scene is to have a woman standing in the rain and allowing the camera to pan up and look down at her cleavage.