In 'Whose Shadow Is That?', players step into the shoes of an unassuming librarian named Sam, who discovers a mysterious old book that releases shadows of people from different times and places. These shadowy figures begin to affect the real world, causing chaos in the town. Players interact with these personalities—some are friendly, others dangerous—while unraveling a web of historical mysteries connected to the shadows. Decision-making affects the outcomes of each character's story, leading to multiple endings and revealing the truth behind the enigmatic tome.