Haru and Raito are two young people living in Saffetiderun village. Searching for the legendary phoenix Helianthus, Haru and Raito travel beyond the borders of the village to a wide world. There are four great kingdoms in this world: Nema (Kingdom of Fire), Lotus (Kingdom of Water), Spathiphyllum (Kingdom of Earth) and Cerulean (Kingdom of Lightning). One day, their mother Yori gifts Raito a fighting stick his father used and Haru a small wooden whistle. These gifts give Haru and Raito clues about their father's past and guide them on the search for Helianthus. Their mother tells Haru and Raito that it is time to leave the village and sends them off with great enthusiasm. Haru and Raito encounter new adventures and challenges on their journey to find Helianthus. Finding Helianthus is not just unraveling a legend, but also discovering their own powers and testing their commitment to each other.