Summer temperatures are at an all-time high, disrupting the sea floor and causing miners to find new strategies; Shawn fights a legal battle; Ken tries to keep his gold crown, while Emily and the Kellys look to expand their operations.
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.