Time has passed since the tragic defeat at the hands of a massive organization, and investigator AIKA has finally returned. However, the incident continues to haunt her, leaving deep psychological scars. Fueled by a burning desire for revenge, she launches a solo undercover investigation and successfully captures a young member of the Black Lion Society, gaining a crucial foothold. She then begins interrogating him. But the Black Lion Society, determined to rescue their man, swiftly moves in on AIKA’s location. Once again, the battle reignites between the vengeful AIKA and the dark, powerful Black Lion Society—plunging headfirst into the heart of the conflict.