Two years ago, Mercy Gray was hailed as a hero for saving lives during a mall shooting. She still carries souvenirs from that day: the fragment of a bullet lodged in her back, a mountain of medical debt, and guilt for ignoring her sister's warnings that the sweet boy next door was anything but.

So when billionaire turned TV host Damien Dare recruits Mercy to compete on his new survivalist reality show, she can't turn down a chance at the whopping cash prize that could send her sister to college. But when she and the other contestants arrive at the off-grid location, something isn't right. The set is empty. The gates close without warning, trapping them inside. And then one of them turns up dead. What appeared at first to be a tragic accident quickly transforms as more contestants start dropping like flies. With time and resources running low, surviving this show takes on a whole new meaning. Mercy must figure out who to trust. Before she's next.