After the massacre in the 11th district 6 months ago a lot has changed . Kotaro Amon was promoted to detective and gets a new partner to the side asked . Also Juzo is promoted and finally gets his long-awaited Quinke . The he will be able to take on the hunt for the ghouls of SS class , who were freed during an attack on the ghoul - KZ . For that matter, the investigators grope at CCG but still completely in the dark . But then she suddenly get help from an unknown informant called Hideyoshi .