A young woman who found the phone Bailey Dawson used to record her videos in I'm Haunted 2 begins an investigation into the entity known as Cyr and the strange events occurring around it.

The cast and crew of the I'm Haunted movie series discover that the evil entity Cyr from their films is no longer just a character - it has crossed into reality to haunt them for real.

Two children wake up in the middle of the night to find their father is missing, and all the windows and doors in their home have vanished.