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Byron is psyched when his older brother Jesse invites him on a weekend caving trip—even if it means spending time with Cole, Jesse's obnoxious college roommate. With Jesse's girlfriend Michelle rounding out the group, Byron is sure the excursion will be a success. Things get tense when they near the cave, only to find that the way in is blocked. Byron stumbles on the entrance to a new cave, but the thrill of his discovery is overshadowed by Cole's increasingly strange behavior. Exploring a ...