The crew of the New Zealand low budget Zombie film Tonight They Come! are filming in the middle of nowhere. The troubled shoot goes from bad to worse when key cast and crew are struck down by a mystery illness. The replacement runner, Wesley Pennington (Harley Neville) arrives on set fresh out of film school and bubbling with enthusiasm just in time for the mystery illness to start turning zombie extras into real, shuffling, un-dead Zombies. Of course the crew are too busy to notice, after all they're very behind schedule, i Wesley is the first to discover that the Zombies are real, and he tries to escape the now deadly film set with a small group of survivors.