There is a horror movie in which several young people go hiking and meet a mutant who can eat people in a cave.

Sarah (Shauna Macdonald)' s originally peaceful and happy life was broken by a car accident, in which her husband and daughter were killed. Although she survived, she never recovered. In order to cheer Sarah up, her five female friends arranged an adventure trip for her in a lonely and ancient cave in the jungle. Luno (natalie jackson mendoza) is one of the most experienced people in field exploration, and she chose to come. Just as the girls marveled at the scenery in the cave, they unconsciously disturbed another creature in the cave. They have no vision and rely on the source of sound to kill them cruelly. In order to save themselves and unite, the girls became suspicious among their friends during their escape. In order to survive, how do they find a way out in the narrow and dark caves?

There are two movies, the second one is about the girl who managed to escape and return to the cave, and then she found that one of the girls was still stubbornly living in the cave and knew the living habits of those monsters like the back of her hand.