Peace and tranquility on the island of Aster, home to both humans and 'merfolk', has long been broken by a devastating phenomenon, recurring every five years. A storm including gusting winds and huge waves mysteriously appeared and eradicated much of the population. The misunderstandings, suspicion and hate born of this disaster have torn the two races apart, and the peace loving merfolk are now in a never-ending struggle to prove their innocence and restore peace to the island. On the human side, things are even worse; under the tyranny of cruel king Orestis, the people suffer and all their king cares for is vengeance against the "fish", as he spitefully calls them, executing merfolk after merfolk for just being near his lands. Secrets, intense emotions and strange phenomena will upset their lives forever.