Idea for a horror story?
An eighteenth century Polynesian fisherman is captured at sea by a British frigate and is forced to help them find the nearest island. He knows, however, by the changes in the ocean currents that there is land nearby that shouldn't be there. And he knows what it is: the fabled island of monsters that has risen from the abyssal Pacific depths to bring it's horrors to the surface world, and which only disappears again following a sacrifice. So he guides the British there, knowing that he will be destroyed along with them, sacrificing himself to save his home island not just from the eldritch monsters but from an even worse fate: the Europeans.