It had been three years and forty-two days since I had chicken nachos from the Mexican Restaurant in town.

No, I don't just remember the last time I had chicken nachos. I just remember it as the last normal day of my life.

I was twelve, and lived with my father, brother, and baby sister. My father decided let's get out as a family to get some food then see a movie. Which, unfortunately, resulted in my baby sister's death.

How?

She was exposed. We all were. But somehow, she was the one who died. Maybe it was because of her weak immune system. Or maybe it was because she was only the age of four. But she died. And that's that.

As far as I could remember, I never had any decent memories of my baby sister. Her name was Willow. And the last time I saw her, she had blood leaking out of her eyes, mouth, ears, and nose.

But that was then. This is now. I still live with my older brother, Nolan, and my father, David.

And my cute dog and my fat cat. How they managed to survive while four out of the five humans on earth died, is beyond me. But hey, I'm not complaining. I love them.

And then of course, there's me. Tessa. And this is my world now.