Meanwhile, Walter discovers a secret message within the book, telling him to go to his local park and dig beneath its steps. Walter & Robin visit the park and dig beneath its 23rd step discovering a skeleton. The two flee and call the police but upon returning, discover the body has been removed. Agatha meets them at the park, having been driven by Isaac. Driving home, Walter glimpses Agatha's muddy fingertips and realizes she moved the skeleton. Walter confronts Agatha, believing she is the author who had murdered the book's publisher to protect herself and removed the skeleton. Agatha admits only to moving the skeleton and finally she admits what she learned at the psychiatric hospital, that the book was written by Walter.