During the summer of 1988, a group of childhood friends in a small suburban town becomes obsessed with playing a brand new arcade game called Polybius. Several years later all but one of the friends has committed suicide. Meanwhile, nobody in the town can recall Polybius having ever existed.

Now, the lone survivor of the group seeks to track down the arcade game in an attempt to find out what drove his friends to take their own lives. But his search may very well uncover something more terrifying than he could have ever imagined.