School Of Death

This is a story about a girl who rode a bus from her high school to her old elementary school, like she did every day. But today was different and she didn't know that it was. And she had to protect her elementary school from a school shooting attack. Her and her friends have to save a school full of kids with the help of the school resource officer, someone she trusted with everything, and two good friends. Can they save their little brothers and sisters along with their friends?