The Usual Sacrifices

Visitors passing through Brownsdale, Kentucky are often never seen again. The locals claim that it's easy to fall victim to the vast local caves if explored unaided, but when two young girls go missing Sam and Dean set out to investigate. As the brothers start to suspect something far more sinister in the town, and possibly lurking in Mammoth Cave, they realise that someone is determined to protect the town secret—even if it means killing Sam and Dean himself.