Vernon's crew attempts their first dive on the frozen battlefield, but tempers explode. Zeke breaks in his season by revisiting a mining spot from his past. Shawn sends in his ace diver, and the Kellys make a much-needed breakthrough.

A perilous plunge into deeper depths wreaks havoc on Chris McCully's air compressor. Shawn scours foreign ground for gold to keep his operation funded. A faulty sluice box could spell disaster for the Kellys.