The stage is Tokyo and there are many ghouls. They live by eating humans. And they can’t eat food like vegetables, meats and fishes. Because of the antisocial diet, they are expulsion targets. The shapes of ghouls are the same as humans. Therefore some ghouls live as normal people. Additionally, there is a Commission of Counter Ghoul called CCG. This is a national administrative agency. Their main activity is capture of ghouls.