The story is set in dark, damp darkness, where a giant machine emits strange sounds. All computer-controlled advanced equipment has been invaded by alien beasts and indigenous people, but continues to operate wildly. In the devastated laboratory, a mysterious emerald-green creature named MO awakens. He finds himself facing a dangerous environment where humans have undergone a terrible cycle between death and reincarnation, parasitized by alien plants. I feel someone is secretly watching everything. During the exploration, MO realizes he has a great mission. Guided by whispers in his ear, he breaks through numerous obstacles. Who created such a tragedy? What hardships lie ahead on the path to finding the answer?