The film opens with full-screen Super 8 footage and we see a family of four standing under a tree with bags over their heads and nooses around their necks: each person is lifted by the nooses and strangled when a large limb on the other side of the tree is sawed off; we see this scene several times and a demonic face with black-triangle eyes and yellowed peeling skin appears.
Three people die by having their throats slit. Blood is substantially shown
A man watches films that he found in his attic and sees people being murdered in various ways, most of the violence is off screen, but the camera work and editing really makes it scary.
We see photos of people with marks on their necks
A small girl is shown swinging from the feet of a hanging man.
A man falls through a weak spot in his attic floor and the camera cuts to an EMT in the kitchen, wrapping the man's left calf with bandages (we see a little blood).
A man sees glowing green liquid in his coffee and passes out, foaming at the mouth (please see the Substance Use category for more details); when he wakes up, he finds himself and his wife and son bound and gagged.
A man argues briefly with a sheriff twice and argues with his wife several times, escalating shouting and cursing until it's very loud.
A woman argues with her son and her daughter in different scenes, screaming at them for drawing morbid pictures.
We hear of a serial killer and a string of murdered families several times.
We hear that a child is missing after a family is murdered.
We hear a deputy and a crime researcher discuss a case of murdered families across America and that a serial killer murdered them all from the 1950s to the late 1990s; a college professor says that the murders are part of a cult following initiation that includes blood sacrifice and the cannibalism of children's bodies and souls.
A girl paints a dead girl swinging from a tire swing on the hallway wall at home and in her bedroom; she also draws four stick people hanging by nooses from a tree with a demonic face on the tree trunk.