The Cheals' grand plan to add another wash plant to their arsenal is derailed by an ill-fitting agitator barrel. Chris suffers a debilitating spider bite, forcing kids Oscar and Luca to take up the mining mantle. Struggling to find another opal honey hole, Lee from Slim Pickings battles dangerous shaft-riddled ground on a quad bike as mine partner Roger contends with an excruciating rib injury. To finance a move to live with her partner Dan in Coober Pedy, rookie miner Renee is forced to operate their massive 50-ton loader solo until a devastating $30,000 mechanical failure brings their enterprise to a grinding halt.