One morning, Takahashi, a writer who has just stayed up all night working, is interrupted by a phone call from his old friend Sonomura. Barely able to contain his excitement, Sonomura claims that he has cracked a secret cryptographic code based on Edgar Allan Poe’s “The Gold-Bug” and now knows exactly when and where a murder will take place—and they must hurry if they want to witness the crime, because it will be committed later that very night!…