Arakawa Hajime, a world-renowned detective infamous for his impeccable record of solving the most complex murders, abruptly announces his retirement. In his final press conference, he promises a sensational autobiography — one that would only be published after his death. The next day, Arakawa is found dead in his study, his throat slit from ear to ear, his own fingerprints on the murder weapon.
The day after his death, his publisher reveals the autobiography's chilling title:
"How I Committed Murder and Framed the Innocent."