An unknown attacker is pestering young beauties with dirty anonymous messages. Then the husband of one of them, Junko Sudo, mysteriously disappears. To find him, Junko invites the famous private detective Kosuke Kindaichi, and a corpse is immediately discovered in the house opposite. Then other victims appear. Is there a connection between murders and anonymous accounts? Why is the face of one of the victims disfigured? What does a crow with a bandaged paw have to do with it? Even Kosuke Kindaichi himself has difficulty answering these questions.