Ranga, an age-old deity, stirs from its long slumber on a remote South Pacific island where it has been neglected by humans. Minami, Ushio, and Yuuhi Shimabara, three sisters residing in Tokyo, realise that they have become the heirs of this island domain and the colossal God. Once Ranga manifests in Tokyo, it sparks curiosity and clashes among the sisters who hold its reins, individuals seeking to obliterate it, and those who desire to utilise its power.