The girl in the yellow raincoat

This is just a random story I've come up with and it's not finished or started I guess

10 children chosen by birth because of something strange in their DNA were tested and experimented on in a underground laboratory. When they wake up 'cause one of them, the early riser suddenly screams waking everybody up. When the rest goes to see what's wrong they find her petrified with fear. A boy from the group walks up to her to what she's staring at. When he sees what petrified her with fear he stutters: "B-b-bodies, t-the scientist, t-t-t-there all dead." The scientist were the only thing that was close to a family for them. They decide to try and look for a way out. A lot of obstacles and difficult decisions slow them down from going outside. But when they do, they're all terrified at the sight.