One day, Fumiki encounters a peculiar dog at the factory. This dog can comprehend human speech and extend blades from its forehead. The mysterious number "23" is carved into its ear. Despite the many unsolved mysteries surrounding the beast, the two begin to communicate and build trust. "23" arrived in town following the voice of a higher power that said, "Observe mankind." Meanwhile, a massive organization is operating behind the scenes to capture "23." The leader, Kiryu, wants "23" so that he can control "Tokoyonokuni, the land across the ocean of the dead, ancestors and human spirits. A paradise of eternal life and decadence."