Masato Jinguu, a high school student with a deep love for animals, reunites with his childhood friend Hanayo, a young elephant, at the transformed Fuji Safari World. During a visit with his friend Hitomi, they stumble upon a startling revelation - the once-friendly animals are now attacking their caretakers, who bear human faces. Uncovering the dark secret of the animals' past experimentation, Masato and his companions must navigate a world where beasts seek vengeance for their mistreatment.