Lights. Camera. Slawter! Grubbs Grady and his half-brother Bill-E are thrilled to join their uncle Dervish as onset consultants for the newest movie by cult horror producer David A Hayms. Shot in a deserted town renamed Slawter the demon-themed movie is to be Hayms s masterpiece. But as strange incidents disrupt the set Grubbs begins to wonder whether more than filming is afoot.