Nayuta spends his days gazing up at the stars above his island home and wondering what lies beyond the horizon. Though people claim the sea they live on is flat and finite, Nayuta knows there must be more out there, just waiting to be discovered. Occasionally, ruins and stars will fall from the sky over Nayuta's home, offering what seem to be glimpses of other worlds. While exploring one such ruin, he and his friends save a small, fairy-like girl by the name of Noi. She tells Nayuta that something very important has been stolen from her and asks for his help in retrieving it. It's with this that Nayuta's journey begins—one which will take him far beyond the confines of his island to experience new worlds and extraordinary discoveries!