Sinister: Ten years ago, true crime writer Ellison Oswald made his reputation with a best-selling account of a notorious murder. Now, desperate to replicate the success of his first book, he moves his family into a home where the previous occupants were brutally executed and a child disappeared, hoping to find inspiration in the crime scene. In the home, Ellison discovers a cache of terrifying home movies, unwittingly opening the door into a nightmarish mystery.

Sinister II: Courtney and her twin boys, Zach and Dylan, have moved into a seemingly idyllic and secluded old house in an attempt to evade Courtney's estranged husband Clint. Unbeknownst to her, the house holds secrets of a gruesome ritualistic massacre and is marked for death. When Ex-Deputy So and So investigates, he uncovers an ancient myth that means the killer might be someone - or something - more evil than anything ever imagined.