"Unfinished Diary" could be the song name? I think that because I think the corruption took over WHILE Greg was writing in a new "journal," and he got corrupted mid-way.
I can see the story going 2 ways 1.Manny is the only survivor and rowleys parents sacrificed themselves saving rowley and manny will help rowley 2. Manny will try to uncorrupt frank and either fail or succeed