Koa is a young adventurer living on a small island in the tropical archipelago of Mara. Determined to discover the world around her, she sets out to explore the ocean, visit distant islands and meet their inhabitants. Along the way, she must take care of her own island, cultivate crops, raise animals, fish, gather resources and craft tools and buildings. As she helps the people she encounters, Koa becomes involved in a conflict with Elit, an organisation seeking to conquer Mara and exploit the ocean. Through exploration, farming, trading and completing quests, she will uncover the secrets of the archipelago and help protect its inhabitants.