Sportswoman, Juno (Medoza) tries to reunite with her estranged friend Sara (Macdonald) after a tragic accident. She forms a spelunking expedition with four other friends and all seems well until they get lost in a cave without supply and a race of blood-thirsty monsters hungering for their flesh. Naturally, this does not help Sara's mental-state and she 'descends' deeper into insanity and self-delusion. Overwhelming intensity grabs the viewer by the throat and doesn't let go for a second. This one will stick with you long after the credits have ended. The R-rated version cuts a minute out of the climax causing it to lose some of it's power. The unrated version is recommended.