As a serial killer stalks the city murdering young women, an actress who just moved to Bucharest with her boyfriend notices a mysterious stranger constantly watching her from across the street. In a foreign country where she does not speak the language and under the scrutiny of this stalker, her life quickly becomes tense and insufferable, but she finds no one to believe her.

Amelia is a single mother plagued by the violent death of her husband. When a disturbing storybook called Mister Babadook turns up at her house, she is forced to battle with her son's deep seated fear of a monster. Soon she discovers a sinister presence all around her.

Mild-mannered sound engineer Gilderoy arrives in Rome to begin work on the soundtrack to a film called The Equestrian Vortex, a tale of witchcraft and murder set inside an all-girl riding academy. Before long he finds himself entranced by the film's mysteriously terrifying allure, and the lines between reality and fantasy begin to blur.

In 2002, a young American couple, Matthew and Naomi, travel to the arctic mountains of Norway. After pulling over during a snowstorm, they wake up trapped in their SUV, buried underneath layers of snow and ice. As if the stakes aren't high enough, it is revealed that Naomi is eight months pregnant in their frozen prison. With few resources, a dwindling food supply, and nothing but time, tension, blame, and personal secrets bubble to the surface.

A doctor whose controversial practice has threatened her license is recruited by the military to treat a cosmonaut. Returning from space after a mysterious accident, the man has brought with him a nocturnal passenger which thrives on destruction; Tatyana wants to stop it from killing while the military wants to keep it as a secret weapon.

A teenage runaway takes part in a sleep study that becomes a nightmarish descent into the depths of her mind and a frightening examination of the power of dreams.