A busted dirt hauling bogger bucket threatens the Cheals' ambitions for mammoth back-to-back opal hauls, as they remove the last dirt from a super pillar holding up their entire mine. The Opal Whisperers partnership with veteran miner Uwe ends abruptly. Desperate for stock to sell at the Lightning Ridge Opal Festival they call in a favor to mine their claim with an excavator and undercover a $40,000 boulder opal. The Misfits finally hit old timers' workings at the bottom of their open cut mine. Exploration of the claustrophobic tunnels are cut short as heavy vibrations risk a mine collapse. Angel attempts her first opal sale at the Lightning Ridge Opal Festival.

The Digi Diggers get their solar plant installed, but the power hungry mine triggers a total system shutdown. Lisa damages an opal filled Yowah nut with the jackhammer jeopardizing sale with a bespoke jeweler designer. The Bushmen must make safe a barebones mine in dangerous wet weather much to Les' fury. Rod is forced to go toe to toe with ratters who stole opal and equipment from their mine. The Mooka Boys drive their loader over a cliff edge as the brakes on the machine fail. Their plight worsens as their dirt processing plant generator tears itself apart, forcing the team to revert to basic hand tools to find opal.