When a virus deadly to adults infects their high school, brothers David and Will and the other students soon break into gangs that fight each other for survival and the hope of escaping their quarantine.

"It was just another ordinary day at McKinley High -- until a massive explosion devastated the school. When loner David Thorpe tried to help his English teacher to safety, the teacher convulsed and died right in front of him. And that was just the beginning. A year later, McKinley has descended into chaos. All the students are infected with a virus that makes them deadly to adults. The school is under military quarantine. The teachers are gone. Violent gangs have formed based on high school social cliques. Without a gang, you're as good as dead. And David has no gang. It's just him and his little brother, Will, against the whole school. In this frighteningly dark and captivating novel, a 2012 Booklist Editor's Choice, Lex Thomas locks readers inside a school where kids don't fight to be popular, they fight to stay alive."--Back cover.

"Take Michael Grant's Gone and Veronica Roth's Divergent, rattle them in a cage until they're ready to fight to the death, and you'll have something like this nightmarish debut ... Thomas' whirlwind pace, painful details, simmering sexual content, and moments of truly shocking ultra-violence thrust this movie-ready high school thriller to the head of the class."--Booklist (starred review).