When a group of boys happen upon a prehistoric cave in France while out hunting for rabbits, they must decide who is trustworthy enough to share their secret with.

On Native American lands in the Old South, a young Indigenous man competes with a white steamboat pilot for the affection of a woman.

A group of seven men and women are chosen for a secret military mission in the arctic, where they discover ancient beings that seek to control them.

Three boys struggle to save their companion on a cave wall climbing trip.

A party traveling west to California experiences unspeakable horror when they become trapped on an impassable trail in the winter.

Four men on an Antarctic expedition at the tail end of World War I survive a near death experience when their sleds nearly falls into a crevasse. The events that follow are chilling and unexplainable, leading all but one of them to block out the memory of it for good.

An intrepid caver, determined to save the woman she loves, descends into caverns where beautiful music supposedly drives humans to insanity and violence.

A man living full-time as a caveman in a historical exhibit where he isn't supposed to speak English and has to pay for his poop to be removed is pressured by his exploitative employer to report his work partner's violation of their rules, despite knowing that she needs to send her family money as desperately as he does.

A group of friends experienced in river navigation brave an infamously dangerous set of rapids, though some of them are more thrill-seeking than others.

A woman is trapped for years inside a cave with basic survival supplies, and she tries to get out.