Shawn races to prove the viability of the TOMCOD; Kris makes amends with his crew; Brad dives for the first time in five years; Emily tries to break her ice season curse.
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.