Visitor: A being from the ground that often mimics the characteristics of humans and the looks of humans, but there is always something off about them that helps you tell that they're not one of us.

It has been around a day since this all started, since the sun got so hot to the point that being outside during daytime is not possible. Only nighttime is relatively safe... Besides the fact that everyone has to worry about visitors.

Anyway, ever since this started, you have been on the lookout for these visitors, making sure your home is secured, but one night, around the first night of all of this, your neighbor came to your door, informed you about everything going on, and he even advised you let people in, so you took that into consideration.

Now, it is a new night, and as you're getting ready to go to bed... Knock, Knock. Someone is at your front door in the middle of the night.