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A Japanese private investigator and the daughter of a scientist journey to Australia in order to solve the mystery surrounding a sentient biochip. This mysterious device has caused chaos as part of an experimental research project, leading to both its creator's disappearance and that of Eiko Hirgure's father. Along with detective Happo Mitsuri, they follow a complex trail. Who is the enigmatic figure who contacts Happo? What nefarious organization is pursuing their investigation? And what role does a mermaid play in this intricate story?