One afternoon, a peaceful high school was occupied by terrorists. The terrorists have unknown biological weapons. Hoozuki who is their leader made them inject the biological weapon's virus into herself...

A dead body with a burned face was found in a park in Tokyo - Miyuki Saeki of the Metropolitan Police Department investigates the incident, but during that time, more incidents occur one after another. And in the shadows there is a mysterious auction that determines the method of killing - justice or evil. (Source: Amazon, translated)