Pet Sematary: Bloodlines is arriving on Paramount+ in October, and the upcoming Stephen King prequel movie will expand the story of one of the author's self-attested most terrifying tales. 1983's Pet Sematary, one of King's early horror novels, is the tale of the town of Ludlow's pet cemetery, where the buried animals don't stay dead for long. The book was one of King's darkest stories, with a family watching their young toddler son die in a terrible accident only to bury him in the "Pet Sematary" and see him return as a dangerous killing machine. The book was adapted into a movie in 1989, which received a sequel in 1992. A reboot arrived in 2019, and now Pet Sematary: Bloodlines offers a prequel.