Andreas and his sons test their Dredge in a German gravel plant. Can the machine suck up material underwater and wash the gold out of the ground? Quicksand makes the test run a treacherous undertaking. Meanwhile, Mat and Rhien stock up on fuel in Australia. The brothers load their off-road vehicles and trailers Down Under with 4,000 liters of diesel in canisters. But on the inclines in the mountains, the heavily loaded vehicles reach their limits despite their four-wheel drive. The duo has to improvise along the way.
