As children Tim (Brenton Thwaites) and Kaylie's (Karen Gillan) parents were murdered. Tim was the trigger man who killed his dad, although the kids have a memory of a haunted mirror that controlled their family.
Tim has had therapy and wants to move on and "protect his recovery" as he can now finally remember he pulled the trigger. Kaylie is compulsive obsessive and insists the mirror is to blame. She goes to great lengths to set up a controlled experiment to prove the mirror is the culprit. Tim is not eager. They have slightly different memories as to what happened.
Their past is presented as a subplot. An hour into the film, you realize that there were things that went on in the household that might be misinterpret by children, yet at the same time there are things going on in the present that don't add up. Is it imagination? Insanity? Supplanted memory? Or is the mirror really haunted?
The film combines several old themes to give us something that seems refreshingly new. Well done all the way around. Good horror build up.
Parental Guide: Some muttered F-bombs. No sex or nudity.