Rookie Justin has cracks in his equipment and his relationships; Col's Crew are a man down and on their last drum of fuel; and in the wild west, new team the Fire Crew are on a wild goose chase hunting a bounty of fabled fire opal.

Rookie Justin gambles thousands of dollars on buying his way out of trouble; Opal Queen Kelly needs a big find underground or risk going broke; and Aaron and Greg's Dragonfly claim might finally pay off.