In 1944, in the Belgian - German border, seven German soldiers survive an American attack in the front and lock themselves in a bunker to protect the position. Under siege by the enemy and with little ammunition, they decide to explore underground tunnels to seek supplies and find an escape route. While in the tunnel, weird things happen with the group.
Grace is a religious woman who lives in an old house kept dark because her two children, Anne and Nicholas, have a rare sensitivity to light. When the family begins to suspect the house is haunted, Grace fights to protect her children at any cost in the face of strange events and disturbing visions.
In the dark silence of the sea during World War II, the submarine USS Tiger Shark prowls on what should be a routine rescue mission. But for the shell-shocked crew, trapped together in the sub's narrow corridors and constricted spaces, this is about to become a journey into the sensory delusions, mental deceptions and runaway fears that lurk just below the surface of the ocean.
A young artist gets stranded in an extensive, immaculate forest in western Ireland, where, after finding shelter, she becomes trapped alongside three strangers, stalked by mysterious creatures each night.
While exploring the neighboring woods, 13-year-old John discovers an unfinished bunker — a deep hole in the ground. Seemingly without provocation, he drugs his affluent parents and older sister and drags their unconscious bodies into the bunker, where he holds them captive. As they anxiously wait for John to free them from the hole, the boy returns home, where he can finally do what he wants.
A small group of scientists and soldiers take refuge in an underground missile silo where they struggle to control the flesh-eating dead that walks the Earth above.
Laura, 25, is an actress in a L.A.R.P. (Live Action Role Playing) Game, where the participants play the survivors of an atomic war who live underground in a sealed bunker. After several mysterious accidents, the game is interrupted and the players leave the bunker while the staff remain behind to investigate the disappearance of Greg, the mastermind of the game. They soon find themselves trapped inside and in peril as they begin to die in mysterious ways and the group realizes that someone or something paranormal is playing a twisted game with them which quickly plunges into a terrifying fight for survival.
Four teenagers at a British private school secretly uncover and explore the depths of a sealed underground hole created decades ago as a possible bomb shelter.
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