Duane Ollinger sinks everything he has into hunting for what he believes is a vast fortune of gold on his property; with each step he takes closer to finding the treasure, the land appears to hold on tighter and stop him in his tracks.

Chad dives into a flooded cave system after a tantalizing discovery.

A mystery lurking underground forces the team to reevaluate their safety.

The team catches a break while trying to find a new entrance to the cavern.

Trespassers prompt Charlie to increase security on the ranch.