The Darkness (2016)

Peter and Bronny Taylor go on a vacation to the Grand Canyon in Arizona with Stephanie, their bulimic teenage daughter, Mikey, their adolescent autistic son, and another family, the Carters. Mikey discovers a small Kiva cavern, where he finds black rocks with symbols on them. He takes the stones.

When the Taylors return home, strange things begin to happen. Bronny finds that the kitchen taps keep turning on, and Stephanie sees handprints on a mirror, both of which Mikey blames on “Jenny.” After Stephanie gets home from school, she vomits into a container and puts it under her bed. Bronny catches her, and she and Peter learn that Stephanie has been throwing up for a while. They take her to a hospital for help, leaving Mikey at Bronny's mother's house. Bronny's mother finds Mikey trying to kill her cat, much to Peter's disbelief.

At home, Bronny searches online for answers to the strange activity and learns about the Anasazi Indians, who believed that demons were bound to rocks hidden in caves. If the rocks are taken, the demons take the shape of a crow, snake, coyote, wolf, and buffalo. The family has already had encounters with a crow and a snake. The demons connect to young children who are dragged into their world, triggering an event known as 'The Darkness.' The only way they can be banished is if the rocks are returned to where they were found by someone who is not afraid.

Bronny and Peter later find Mikey covered in black marks from a fire in his room, blood pouring from his mouth. Later that night, Bronny has a nightmare of a wolf. Depressed, she starts drinking. In Mikey's room, the fire-damaged part of the wall is revealed to be a portal. Stephanie is choked by handprints appearing all over her wall and body. In the treehouse, Peter sees a coyote and the shadow of a demon in Stephanie's window. The force stops choking Stephanie as he rushes in. He then breaks down Mikey's bathroom door and finds him with marks all over the walls and ceiling.

Peter calls a number given to him by his boss. It belongs to a woman named Teresa, who is said to perform spiritual healings. Teresa comes over with her granddaughter, Gloria, who acts as an interpreter. As they cleanse the house, Teresa and Gloria go into Mikey's room and note that this is where the real evil lives. They recite a chant as Mikey tries to enter the portal.

Peter sees Mikey walking into the portal with the demons. He finds the stones and follows Mikey into the portal but cannot set the stones down due to his fear. He offers to swap places with Mikey, but Mikey ends the event of 'The Darkness' by picking the rocks up and putting them back down, as he is not afraid. The demons are banished, and Peter and Mikey jump out of the portal together. It disappears, and Gloria declares that the house is clean of evil energy.