Young teen Callie was one of the rare few to survive the disease after being subjected to the so-called treatment. She was kidnapped and experimented upon at a secret lab that works with antimatter. When she breaks free of her prison, she unleashes a wave of destructionùthe contagion. Meanwhile her older brother, Kai, is looking for her. And his smart new friend Shay may hold the key to uncovering what truly happenedùShay was the last to see Callie alive. The problem is getting past the soldiers