When twin brothers find a mysterious wind-up monkey, a series of outrageous deaths tear their family apart. Twenty-five years later, the monkey begins a new killing spree forcing the estranged brothers to confront the cursed toy.

Liz and Malcolm escape for a romantic anniversary weekend at a secluded cabin. When Malcolm suddenly returns to the city, Liz finds herself isolated and in the presence of an unspeakable evil that reveals the cabin's horrifying secrets.