The CCG's invasion on Anteiku took place two years ago. Despite the fact that the atmosphere in Tokyo has changed dramatically as a result of the CCG's growing influence, ghouls continue to be a problem because they have begun to exercise caution, particularly the terrorist organization Aogiri Tree, which recognizes the CCG's growing threat to their existence. The formation of a special force known as the Quinx Squad might give the CCG the boost they need to eliminate Tokyo's unwelcome citizens. They take part in operations to exterminate the hazardous monsters as humans who have undergone surgery to exploit the specific skills of ghouls. Haise Sasaki, the group's leader, is a half-ghoul, half-human hybrid who has been trained by Kishou, a renowned special class investigator.