Isabella lives on a tropical island lost in the ocean. She is the daughter of a cartographer who passed on to her all her knowledge of this corner of the earth. Part of the island is forbidden and jealously guarded by a fiery demon - or so the legend goes. Many centuries ago they tried to defeat him, but it did not work out. Now, when the peace of their sleepy town is disturbed by the news of the disappearance of the girl and the sudden appearance of terrible monsters, it becomes clear that someone has crossed the ancient border. Now only the dedication and brave heart of Isabella, the girls in whose veins ink and who can read the stars, will help save the island.