Mordock's Cave is a natural wonder, and thousands of tourists take the boat trip on the lake deep beneath the earth's surface. After a power failure, a group of tourists become trapped, and, emerging from the depths come the creatures who dwell there - creatures that nature never intended.

Mordock's Cave is a natural wonder, and thousands of tourists take the boat trip on the lake deep beneath the earth's surface. After a power failure, a group of tourists become trapped, and, emerging from the depths come the creatures who dwell there - creatures that nature never intended.