A cyclone hits the castaways' camp, bringing gold from the wreck of the Mary Jane---and destruction. A storm destroys in one stroke everything that the castaways had painstakingly built up in five weeks. Jan Lindberg is proposing to build a weatherproof hut. However, Billy, Irving and Holt are with their thoughts somewhere else: they have found a few pieces of gold: the remains of the ship's treasury.

The castaways react with alarm when Cathy comes upon a wounded savage in the jungle.