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.

What would you think if you received letters from someone and it seemed they could never be caught? This just so happens to be Delilah's problem right now. The police have been able to do nothing to help her until they suggest that she be sent away to Bentwood Institute for Boys to go into hiding. But being the only girl in an all-boys school for delinquents isn't exactly as good as it sounds. After entering the school, she finds herself being stalked again. But as she looks for answers, secrets start to unravel.