The race for untapped gold in bottomless depths kicks off as Chris and newcomer Joe go to war over a contested spot. Vern deploys an untested crew and new Nitrox air system for their deepest dives yet. Mr. Gold attempts to access riches via inland gold.

The first storm of summer arrives to rock the fleet; rivals Chris and Joe battle over big gold; Vern's diver faces a deep-water emergency; Kris orders the Mistress to put her crew on notice; Shawn makes a promising discovery.