Five crews set up their camps on the ice to begin their quest for gold-rich ground. On the Clark, Ian works overtime but when it's time to surface he loses visibility and his oxygen. Tensions simmer on the Wild Ranger when one diver tries to school veteran dredgers about the best way to mine while Steve Riedel takes in daughter Emily after Zeke kicks her off his crew.
Scott fights to control his temper when the crew gets on his nerves and Zeke adds an overly confident miner to his team. Meanwhile, Emily is frustrated by her dad's unprofessional behavior and realizes that she must take matters into her own hands if she is going to get gold this season.
Scott's dredge runs out of gas jeopardizing the life of his diver and Shawn's greenhorn has a costly accident. On the Clark, Zeke blows up at Glen whose arrogance is impacting the entire crew while the Wild Ranger's Vernon tries to increase morale when he dons a suit and dives for the first time.
Zeke contemplates leaving the Clark when he suffers a delayed emotional breakdown following the death of his best childhood friend. Over at the Shamrock camp, Shawn feels the pressure to succeed with the arrival of his critical father Steve Pomrenke while Emily has mounting issues with her own dad Steve Riedel.
Ice dredging season is ending but not before the miners get one final dive. Zeke prospects under a dangerous pressure ridge that can crush him if it collapses while Emily attempts to prove herself in front of the crew by making good on a dare. Scott Meisterheim drives through the streets of Nome begging for money to fuel his dredge and Steve Riedel settles his bet with Vern.
Summer mining has begun and a new mega-dredge crewed by a familiar face is on the scene to compete with Shawn's Christine Rose. Emily gives the Edge a new name after buying it from Zeke while her dad Steve has a slow start on his own dredge when he loses the keys.
Zeke recounts the events leading up to his emotional breakdown, arrest and time spent in a mental ward while Shawn takes a break from mining in order to meet his new grandchild in Anchorage.
Shawn asks rival Hank for help repairing the spuds on the Christine Rose while Zeke threatens to repossess the Eroica if Emily doesn't make good on her payments. On the Minnow, diver Brad Kelly scrambles to reach the surface after his air hose is compromised and Steve Riedel helps search for a friend's missing dredge.
Hank's Gold Grabber mega-dredge is found to be out of code after the Coast Guard performs a surprise safety inspection and Emily's Eroica could suffer the same fate. Meanwhile, Vern is counting on a new diver to continue the Wild Ranger's lucky streak but they could be sidelined by a broken motor.
Shawn threatens to leave the Christine Rose when family tensions come to a head. Meanwhile, one of Emily's new divers is injured and she rushes him to the hospital while the rest of her crew defies orders and starts the gold clean out in her absence.
Shawn and Cody rake in the gold after Steve complains about needing more money to get out of debt. Over on the Wild Ranger, Vern finally gets the dredge up an running only to be faced with more equipment problems the minute they start putting gold in the box.
Emily and Glen take a road trip to mine for gold in a river after stormy weather keeps them off the sea while in Homer, Alaska, Vern's wife puts him on notice that he needs to get on the gold or they will face huge financial debts. On the Christine Rose, Shawn is aggravated by other dredges following him as he searches for gold.
Emily's apology to her crew falls on deaf ears when they refuse to return to the Eroica after quitting en masse. Later, her former friend Zeke arrives back in Nome with a unique money-making scheme and Shawn Pomrenke's Christine Rose gets a new backhoe he hopes will help finish the season in the black.
The two excavator dredges compete to be the first on gold-rich ground but Hank may have underestimated Mr. Gold. Over on the Minnow, the Kelly brothers are enraged when accused of claim jumping and Glen's Dragon proves to be the most inventive dredge on the sea.
Steve is in danger of losing the Minnow when he can't pay his debts and his crew contemplates quitting after days of bad weather keep them off the water. Meanwhile, the Gold Grabber gets an early start and raids Shawn's prime mining spot.