In Regolith City, a lunar metropolis where full-body cyberization has become commonplace, detective Sid Blake accepts a job that leads him to infiltrate a private presentation held by Kaintech. There, he witnesses Kaintech’s new android, Primer, massacre everyone in attendance. Only two people survive: Sid and Lin. While evading Kaintech’s attempts to cover up the incident, the two set out to uncover the purpose of the mysterious android Primer and the truth behind the massacre.