The Kito clan has cast Okarun and his companions into an alternate-reality version of Jiji’s family home, offering them as sacrifices to a menacing serpent god. There, they meet another of the clan’s offerings—a child who possesses the softhearted Jiji, transforming him into the terrifying Evil Eye. Now, with Jiji's body under the serpent god's control, the stakes have never been higher.
In a desperate attempt to save his friend, Okarun takes on the Evil Eye alone, forcing Momo to return to the surface and seek help. But with time running out, Momo must devise a bold plan to defeat the serpent god and free Jiji. Will she manage to outwit the god and save her friends, or will the serpent's grip prove too powerful to escape?
