A new season opal hunting begins! The Rookies face potential disaster from the get go; for Col's Crew, their mining quest is derailed by a serious illness, and the Opal Queen brings in new muscle and new machines for an underground opal hunt.

For the Rookies, there's tension as a new partner leads them on a wild goose chase underground. The Cooke Brothers' season is off to a bad start and Col's Crew is called on an emergency repair, wrestling a one-ton tire change.