While visiting the popular Five Mile Caverns attraction, a group of tourists have their lives threatened by a sudden disaster. Trapped with seemingly no hope of rescue, the diverse strangers must team up to climb slippery inclines, brave an underwater passage, navigate their way around a geothermal pit, and deal with problems caused by a desperate fugitive in order to reach daylight. Irwin Allen-produced telefilm stars Dennis Cole, Susan Sullivan, Leslie Nielsen, and Ray Milland. 98 min. Standard; Soundtrack: English Dolby Digital mono.