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, cave-dwelling creatures. With rising tension and dwindling trust, the women must fight to survive against both the predators and each other.

• Celador Films
• Northmen Productions
• Shauna Macdonald
• Natalie Mendoza
• Alex Reid
• Saskia Mulder
• MyAnna Buring
• Nora-Jane Noone
• Oliver Milburn
• Molly Kayll