While exploring a volcanic region, the duo, along with their guide Hannah, becomes trapped in a cavern after a sudden collapse. Their only way out is down. As they descend deeper, they discover a "world within a world" filled with:
Trevor, Sean, and an Icelandic mountain guide named Hannah travel to a volcano in Iceland. After a cave-in, they fall deep into a "lost world" at the center of the Earth. They must navigate dangerous terrain—including carnivorous plants, giant mushrooms, and prehistoric creatures—to find a way back to the surface before the temperature rises to lethal levels. Legal Streaming Options