The Rookies battle their biggest claim yet, and each other; Col's Crew must bring out the old machines to hunt a new opal seam; and it's heating up as the Fire Crew race a fuel leak, chasing legendary red fire opal.

Rookie Justin ropes in a stranger in a mad dash to get his excavator across a busy highway. Opal Queen Kelly battles a new claim with a new partner and with Col struck down with illness Aaron and Greg must push on at Dragonfly without him.