A group of adventurous women embarks on a caving expedition in the Appalachian Mountains, only to find themselves trapped underground. As they navigate the labyrinthine cave system, they encounter a terrifying and deadly threat lurking in the shadows. Directed by Neil Marshall, this intense horror film is known for its claustrophobic atmosphere and strong performances, particularly from stars like Shauna Macdonald and Natalie Mendoza. The film is celebrated for its practical effects and suspenseful storytelling. For those interested, it can be viewed for free on 123Movies / Movies123.