The film has a very disturbing and unsettling atmosphere and soundtrack
A man enters the mindset of a killer. In one scene which some may find frightening, is when he imagines one of the murdered victims, and her eyes and mouth, are glowing white.
The film has no jump scares or pop ups, however there is one scene in which a smash cut of flashing images of the murderer victims are displayed. This only lasts a few seconds, but is graphic.
The bloody aftermath of a family with young children slaughtered in their home can be very unsettling.