In 'Whose Shadow Is That?', players assume the role of Alex, a paranoid librarian who discovers a series of sudden, mysterious shadows appearing in the library at night. These shadows seem to take the form of forgotten book characters who whisper secrets about the library's dark past. As Alex delves deeper into the eerie occurrences, players must navigate mind-bending puzzles, make crucial decisions influencing their sanity, and uncover a hidden narrative woven into the very books that surround them. The more Alex learns, the more the shadows begin to weave their own sinister agenda, challenging players to decide who they can trust before they lose themselves in the story.