Furnace Penitentiary: the world”s most secure prison for young offenders, buried a mile beneath the earth”s surface. Convicted of a murder he didn”t commit, sentenced to life without parole, Alex Sawyer knows he has two choices: find a way out, or resign himself to a death behind bars in the darkness at the bottom of the world. But death is the least of his worries. The prison is a place of pure evil, where inhuman creatures in gas masks stalk the corridors at night, where giants in black suits drag screaming inmates into the shadows, where deformed beasts can be heard howling from the blood-drenched tunnels below. And behind everything is the mysterious, all-powerful warden, a man as cruel and dangerous as the devil himself. Together with a bunch of inmates, Alex plans an escape. But as he starts to uncover the truth about Furnace”s darker purpose, Alex”s actions grow ever more dangerous, and he must risk everything to expose this nightmare that”s hidden from the eyes of the world.