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.

While hiking with his two young children, a man falls to his doom in a cavern called the Bottomless Well, leaving his son and daughter to race to save his life.

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

A young woman who is a Speleologist teams up to explore an extremely deep cavern with a Geophysicist who believes that the earth is hollow and the Underworld is accessible through caves. Once sealed by Aboriginals, the pair soon regrets reopening the cave.

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

A group of explorers take a traveler to tour a cave where ghosts sing songs forgotten by the living. Upon entering, they realize they underestimated the effect the songs have on the psyche.

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

An archaeologist finds an ancient funeral cave and intact skulls containing jars of bone marrow. When she studies one of the jars back at the lab, she accidentally exposes herself to its contents and experiences a strange transformation.

A disagreement between a cavern tour guide and his "hippie" dance-instructor wife over whether to risk growing weed in order to scrape by ends with him living alone in an RV behind his friend's house, spiraling into alcoholism.

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.