After a personal tragedy, Sarah joins her friends on a caving expedition in the Appalachian Mountains. But when a rockfall traps them deep underground, their adventure turns into a nightmare. As they search for a way out, the group discovers they are not alone—lurking in the darkness are savage, cav...
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Shauna Macdonald, Natalie Mendoza, Alex Reid, MyAnna Buring, Saskia Mulder, Nora-Jane Noone, Leslie Simpson, Oliver Milburn