Time is running out and the Devil needs to take over a man’s (Gabriel Bryne) body so it can infuse Robin Tunney, in so doing producing the antichrist and opening up the gate from hell to earth. She’s the acceptable option since her “stars” line up so well.
This has to transpire completed prior to the finish of 1999.
All is departing well until Arnold runs on top of Gabriel Byrne with a subway train and after that blows him up.
With no one in addition to convert to, and time running away, the devil takes over Arnold’s body.
Arnold is too powerful and smart instead of the devil and murders himself by falling on a statue’s sword, thus thwarting the devils strategy.
The Devil inside a giant fireball, goes back to hell, having to pass the time until 2999 to try again.
(999 is 666 upside down, get it?)