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.

Join Grubbs as he navigates the eerie happenings on set, questioning whether the demons are merely part of the script or something more sinister lurking in the shadows.