Four years since its debut, Aiena G's Narcotics Agent series returns with Yui Hatano as the lead investigator. This installment goes back to the beginning of the original story, depicting the fateful encounter with her future partner and the incident that sparked their long-standing vendetta against the drug syndicate. It follows a passionate, justice-driven young detective who takes matters into his own hands with a solo investigation. However, unknown threats lurk behind him, and a dark conspiracy gradually unfolds...!