Ailan and Marill have challenged the evil power of Vimperion, found two pieces of the Key that opens the starry Prism and have started the search for the flame which gifts energy and life. But during the quest Ailan lost his eyesight. Now their task becomes even more difficult: they will have to go to Keola and find out where the last piece of the Key is hidden, but they will also have to find the Ta Yan, the green spirit who has the power to cure the creatures of the forest and heal Ailan’s eyes. To succeed, they will have to fight the wild nature of Keola, but also Vimperion’s steam powered machines, but most of all they will have to learn not to get discouraged and keep on fighting even when everything seems lost.