Time has passed since that abhorrent event in which she was completely defeated in front of a huge organization, and investigator AIKA has made a comeback. However, the events of that day keep coming back to her mind... With revenge on her mind, she goes undercover on her own and succeeds in kidnapping and interrogating young members of the Black Lion Society in order to gain a foothold in the investigation. However, the huge organization Black Lion Society also comes to AIKA in order to take back the young people... Burning for revenge.