The snow has melted and the blossoming cherry trees welcome Akari to another springtime on the planet Aqua. Her determination to become a great undine is unwavering, and while this girl may have rivals in the world of gondoliers, that doesn't mean she can't be friends with her competitors! The discovery of an ancient treasure map sends Akari - along with her fellow undines - on a scavenger hunt that is sure to yield the endless treasures of her beloved town of Neo-Venezia.