Detective Damien Seryph investigates a string of murders that connects to a group trying to bring forth the 4 King Demons of Hell. Damien's past connects him to those involved and will force him to become "The Demonologist".
Annabelle is a Raggedy Ann doll that is claimed to be haunted. According to paranormal investigators Ed and Lorraine Warren, the doll frightened its owner, so they moved it to their museum in Connecticut during the 1970s. Academics and science writers have dismissed their claims as myth and folklore. A character based on the Warrens' story is one of the antagonists that appear in the fictional Conjuring Universe.