In a small town, Hell is unleashed. Two towns are completely wiped out by some unknown assailant. The people are slaughtered in a single night and there's no clue in the morning as to what might be the cause of the carnage. Raven Hallow is under attack this night, the third town to come under the attack of some inhuman murderous creatures. With no power, no phones, and the roads blocked by fallen trees, the town's folk are trapped. One small group of survivors battle their tormentors and search for a way to destroy them. Along the way, they battle beasts of incredible strength, a scientist with illusions of power, and loved ones transformed into something terrifying.