The three are chased by gorillas and run towards the partial ruins of an ancient human city. They run across the broken bricks and concrete that dot the otherwise unbroken grassland to get to a tall building. There they are surprised to find a huge store of weapons left over from a past age. They realise this must be a secret store known only to Urko, and the gorillas are the guards stationed to protect it. They blow up one of the buildings to lure the gorillas into the ruins and then set about dispatching them. After a drawn-out gun battle the three fugitives take guns and any food they can salvage and ride away on the gorillas' horses.