For years, sirens of the island of Anthemoessa lured fellow sailors and fisherman who dared venture or approach their homeland, Anthemoessa, through vocals until their prey met their doom. As a result, Greek and Italian officials has made the land off limits to the public and, upon hearing this, the Anthemoessians made sure of that. One day, three young sirens, Ione, Nomiki, and Ozias were soaring over the river to catch fish for dinner. Meanwhile, a young boy, Galen, is going fishing to make end meet for his family after his father gets injured. As the two parties cross paths, they all form a friendship, which could lead to consequences.