In 'Whose Shadow is That?', you play as a shadow puppeteer in a dark, dystopian city where the lines between reality and illusion blur. After you start to receive messages from a sinister shadow named 'Echo' that takes on the form of people from your past, you must navigate through a series of mind-bending dilemmas to uncover the truth about the city's dark secrets and your own psyche. As you interact with eccentric characters and solve puzzles, you gather clues that lead you deeper into a conspiracy that challenges your understanding of trust, identity, and the nature of reality itself.