After stumbling upon their father's vintage toy monkey in the attic, twin brothers Hal and Bill (Theo James) begin witnessing a slew of horrifying deaths. In an attempt to get away from what they just witnessed, the brothers discard the monkey and head off on their own separate paths, thinking the experience is now behind them.

However, years later, when a new batch of victims begins to surface, the brothers must come back together and embark on a mission to eliminate the cursed toy for good.

Based on the 1980 short story by Stephen King.