Sarah's (Shauna MacDonald) peaceful and happy life was accidentally broken by a car accident. Her husband and daughter died in the accident. Although she survived, she never recovered. In order to cheer Sarah up again, her five female friends arranged an adventure trip for her in a remote and ancient cave in the jungle. Juno (Natalie Jackson Mendoza) was the most experienced in outdoor adventures and she chose to come here. Just as the girls were amazed at the scenery in the cave, they unknowingly disturbed another creature in the cave. They had no vision and relied on the source of sound to cruelly hunt them. The girls united to save themselves, but they doubted each other during the escape. In order to survive, how could they find a way out of the small and dark cave?