After a group of biologists discovers a huge network of unexplored caves in Romania and, believing it to be an undisturbed eco-system that has produced a new species, they hire the best American team of underwater cave explorers in the world. While exploring deeper into the underwater caves, a rockslide blocks their exit, and they soon discover a larger carnivorous creature has added them to its food chain.
Distraught, confused, and half-wild with fear, Sarah Carter emerges alone from the Appalachian cave system where she encountered unspeakable terrors. Unable to plausibly explain to the authorities what happened - or why she's covered in her friends' blood - Sarah is forced back to the subterranean depths to help locate her five missing companions.
Retired cop James Lasombra is asked by a friend to investigate the disappearance of her daughter, who seemingly packed in the night and left an ominous message on the bathroom mirror - "The Empty Man Made Me Do It." As he investigates this mysterious figure further, James begins to see and hear strange things, and is forced to come to terms with his past and what it means for his future.
A woman brings her family back to her childhood home, which used to be an orphanage, intent on reopening it. Before long, her son starts to communicate with a new invisible friend.
A troubled teenage girl who’s struggling to cope with the accidental death of her father suspects that the mysterious killer stalking her hometown is not only her neighbour but her mother’s new romantic interest.
When a frightening wave of violence sweeps through New York City, troubled cop Sarchie fails to find a rational explanation for the bizarre crimes. However, his eyes are opened to a frightening alternate reality when renegade Jesuit priest Mendoza convinces him that demonic possession may be to blame for the gruesome murders. Together, they wage a valiant supernatural struggle to rid the city of an otherworldly evil.
A man imprisons his estranged junkie friend in an isolated cabin in the boonies of San Diego to force him through a week of sobriety, but the events of that week are being mysteriously manipulated.
A man wakes up deep inside a cave. Suffering amnesia, he has no recollection of how he came to be here or of what happened to the man whose body he finds beside him. Tailed by a mysterious creature, he must continue through this strange and fantastic world. Enclosed, Tolbiac has no other option to reach the surface than to use REZO ZERO, secret observing cells in this cemetery-like abandoned mine.
Based on real events. In a densely forested area north of St. Petersburg people have been going missing for three decades. The few corpses ever found were naked. On October 14, 2017 a team of volunteers went out into the woods in search of a missing teenager. Soon, all communication with them was lost. Locals believe they were taken by the same dark spirit that took the others. They call it the Limping Widow.
In a Asian desert, a team of explorers learn of a newly discovered cave system and set out to explore it. However as soon as they begin the descent, it becomes clear that this was a secret that should have remained below the surface.
In Red Canyon, Regina and Devon return to their family home in the badlands of Utah to face the memory of a brutal attack - and put it behind them. But in coming home they awaken a killing rage in a town where everyone has ties that bind.
Under the border leading into Mexico, within a labyrinth of caves, a deadly presence haunts all who enter. For four friends on an expedition, the caverns become an underground graveyard as the tortured ghosts prey upon them, one by one.