It has been four years since the first Yui Hatano work in Ienergy's Narcotics Investigator series was released. This time, we go back to the past of the first work and see the encounter with the investigator who would later become her partner, and the incident that started her feud with the drug cartel. In her younger days, Detective Hatano hated evil because of her passion, and sometimes tended to run on her own investigations. However, the hand of evil was creeping up close and personal...!