The local legend of "The Sundowner", a turn-of-the-century bushranger, sparks Mike's interest in looking for the bushranger's hideout. Dead ducks are discovered in a lake and an autopsy reveals that lead poisoning was the cause of death. Small traces of gold are also found in the duck's gullet. Using remote sensing, Mike and Nikki discover the exact location of The Sundowner's hideout, now covered by the lake. They search underwater and locate the submerged cave, but Bruce and his gang arrive to collect the spoils themselves. Much to their disgust, no gold is found. However, plenty of antique bottles are found and Mike and Nikki end up selling the antique bottles to a local dealer.