In 'Whose Shadow Is That?', players step into the shoes of a renowned detective who can interact with shadows that reveal the secrets of their owners. Set against a backdrop of an eerie city where shadows behave independently, players must solve a series of bizarre crimes by deciphering the clues hidden within these enigmatic silhouettes. As the detective delves deeper, they encounter a sinister organization that manipulates shadows for their dark agenda. The choices players make will affect the narrative's direction and the fate of its inhabitants, leading to multiple endings based on their interactions with the shadows and the truth they uncover.