The movie follows a group of friends who go on a spelunking adventure – that’s cave exploration for the uninitiated – and end up encountering monsters within the labyrinthine underground system.

A series of films centre around six friends reunite for a caving expedition. Their adventure soon goes horribly wrong when a collapse traps them deep underground and they find themselves pursued ...

Distraught, confused, and half-wild with fear, Sarah Carter emerges alone from the Appalachian cave system where she encountered unspeakable terrors. Unable to plausibly explain to the authorities ...

A year after a severe emotional trauma, Sarah (Shauna Macdonald) goes to North Carolina to spend some time exploring caves with her friends; after descending underground, the women find strange cave ...