While visiting their elderly cousins in a remote coastal town, brother and sister Jerry and Terri are told about an apparently haunted cave by two mysterious teenagers. However, when they explore the cave, the mystery deepens.
Reviews
WasAnnon
Slow pace in the most part of the movie.
ChicRawIdol
A brilliant film that helped define a genre
SanEat
A film with more than the usual spoiler issues. Talking about it in any detail feels akin to handing you a gift-wrapped present and saying, "I hope you like it -- It's a thriller about a diabolical secret experiment."
Anoushka Slater
While it doesn't offer any answers, it both thrills and makes you think.