2061 AD. Fifty years have passed since humanity developed the Network society. It was expected that this new infrastructure would create a utopia where people connected with one another at the level of consciousness. However, new social problems, such as personal data leaks and the spread of manipulated information, began to emerge. Nevertheless, people continued to rely on the Network to exchange information and proved unable to choose to abandon it. Eventually, a new Network realm with more effective security measures was developed. This was called the Meta Real Network, usually abbreviated as "the Metal." The Metal stored personal memory data within protected virtual stand-alone organic cyber enclaves called bubble shells and eventually permeated the everyday lives of people. However, people gradually learned to release and explode their instincts within the secure environment of the Metal. The unleashed instincts pushed each individual's consciousness to drown in the sea of information and to be exposed to the pressures of desire. Meanwhile, norms and regulations continued to bind their real-world lives. Thus, strange friction between the two worlds began to manifest itself as aberrations beyond the bounds of the imaginable. Experts who challenged the deep sea of the Metal to investigate and decipher such aberrations were called cyber divers. This is a story of a cyber diver, Masamichi Haru, who investigates the incidents that lie between Reality and the Metal.