The Bushmen need to sink new shaft for extraction pipes in their flooded mine but efforts to free their drill rig from a bog causes the rescue loader to join the rig trapped in the treacherous mud. The Blacklighters are forced to work a new claim using an ancient opal processing plant, but emergency repairs cause John to get tumbled in the trommel and a busted extraction fan suffocates Xavier with excess dust. The Misfits discover they’re losing precious opal as they clear mountains of dirt out of the depths of their vast open cut mine, so they attempt a dangerous night dig with an excavator and ultraviolet blacklights.