Behind irregularities involving land transactions and registration, suspicious deaths become linked to harms from the past. As it pursues blind spots within social systems, this mystery exposes the motives and guilt of those involved.

A social mystery that moves from irregular land dealings to suspicious deaths and past harms.

Aspiring mystery writer Kano receives a bundle of detective fiction that begins with the suicide of his friend Ozaki. It uses real people as characters and contains a score titled Waltz: My Cipher to Ponder; each solution reveals another cipher. Driven by mounting fear, Kano visits the real Ozaki, only to learn that an unsolved riddle remains. Layering ciphers with fiction within fiction, this classic-style mystery approaches a truth touched by madness.

The score that yields another puzzle with every solution is not a last testament but the entrance to a terrifying cipher.