As the miners rush to solid ground before the ice vanishes, Mr. Gold outlasts the fleet to secure TOMCOD. Kris assembles a makeshift operation. Emily rolls the dice on one last dive and Vernon hightails it to land on dangerous ice.
Each season of the show follows a different group of dredgers, those who search for gold in shallow waters, at the bottom of the sea or even ocean. They often collect paydirt, ground from the seabed that contains some precious ore.