I am going to die. I didn't even get a chance to tell my wife I love her, to hug her one last time. As I look out of the window I still saw the fire trying to engulf the whole plane. As I look throughout the inside of the plane, I see that I'm the only one left. At least my kids don't see me panicing. I can barely bear the heat. I look at the parachute but it seems to be broken because the parachute clip was broken off. I can't believe this is happening to me. I think to myself, " Well, we made a good run." Can I survive if I crash?

Seventeen-year-old April Parker wakes up in an underground facility, a shock bracelet on her wrist and a five-day countdown on the clock. Dozens of other teens share her inexplicable fate, but their unseen captors never intervene no matter how brutal conditions become. When the ruthless - and unnervingly magnetic - Marcus seizes control, April's trauma-forged instinct is to lay low. But protecting her friends drives her to bargain with the boy she should fear most - a boy whose reality fractures with every tick. Then the countdown ends, and the real terror begins. Powers ignite. Alliances shatter. And predators are born. And with a saboteur among them determined to keep the doors closed forever, escaping what comes next may be the only way to survive it.