each year for the past ten years strange,purple clouds have appeared in the sky,bringing disaster to the locales over which they hang.shu,kluke,and jiro are determined to fight back.through some gnarly misadventures,the three friends find themselves trapped in a flying fortess.they end up swallowing glowing orbs which has the strange result of making their shadows transform into monsters; kluke's become a blue phoenix ,jiro's a blue minotaur ,and shu's a blue dragon .following their wscape from the floating fortress,they encounter more people from towns that have also fallen victim to purple clouds.