Birthday boy Shawn Pomrenke boldly moves back to Tomcod. Fed up with a faulty sluice box, the Kellys resurrect an old piece of equipment called "The Coffin." Zeke finds a reef that could yield some great gold, and Chris McCully plans a marathon dive.

With 72 critical hours left in the Bering Sea mining season, shifting ice cuts off access to Vern's diver under the ice. The Kellys hit a hot paystreak but are praying their repairs will hold up. Shawn hits bedrock and learns if his gamble paid off.