Besar's ship and the Gerrymander both approach Krakatoa the following morning and find the island's volcano erupting. Despite their fear of the volcano, both the Gerrymander's men and Besar's pirates go ashore and climb the mountain, with each party racing the other to be the first get to a temple at the mouth of the volcano where the diamonds supposedly have been hidden. During the climb, Boll spots Kim Kim on the shore below. As the eruption becomes more powerful and lava begins to flow down the mountainside, Boll and the crew of the Gerrymander decide that the situation has become too dangerous for them to continue their climb to the diamonds; instead, they rescue Kim Kim, return to the Gerrymander, and head out to sea. Besar and his men also soon give up on finding the diamonds and put to sea in their own ship to flee the volcano. Boll expects the eruption to generate a huge tsunami, so he orders his crew to set the sea anchor and turns the Gerrymander toward Krakatoa to ride out the wave, which she successfully does. Besar instead makes the mistake of trying to outrun the tsunami, which capsizes his ship. He and his crew drown.