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.

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

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.

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.

Ancient, doomed Moggadeet struggles to overcome the deadly cold in order to save their beloved Lillyloo from the harsh, alien world they inhabit together.

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 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.

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.

A boy finds a mysterious caterpillar-like creature in the forest one day. He brings it home and kills it to add to his wildlife collection, but becomes haunted by creatures he can no longer control.

A husband and wife find their union put to the test when a mysterious creature begins to hunt them on a mountainside.