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 murder, because it’s later that very night! Sonomura has a history of lunacy and playing the amateur detective, so Takahashi is of course reluctant to believe him. Nevertheless, they stake out the secret location, and through tiny peepholes in the knotted wood, become voyeurs at the scene of a shocking crime…