The Bushmen's home-made hoist and bucket fails, and Rod is forced to down tools with busted ribs. Les discovers a seam of opal but fails to impress a buyer who makes a low ball offer, raising the Bushmen's ire. Sofia and Isaac, The Opal Whisperers, get trapped at the bottom of their open cut mine in sweltering temperatures. Sofia's jeweler is unimpressed by the opal she must work with to create bespoke necklaces. The Cheals start work on a new mine only to discover their mothballed machinery needs major repairs and flooded access roads to their processing plant bog their dirt hauling truck.

The Bushmen's drill rig loses a vital pin, forcing 74-year-old Les to undertake emergency repairs four meters in the air and Rod struggles to maneuver their 4 ton digger across treacherous mud deep underground. The Digi Diggers flooded mine wall collapses as Josiah and Lisa attempt a new method of extracting Yowah nuts from the mine wall with a high-pressure hose after they destroy precious opal with a pick. The Mooka Boys take on an old timers' mine for their last dig of the season. Matt is hit with a crippling asthma attack working in a pocket of bad air and an unstable wall collapses on Cozza as he struggles to extract opal.