In 'Whose Shadow is That?', players assume the role of a brilliant but reclusive detective who has spent years living in a secluded mansion filled with memories of past cases. One night, while meditating over his latest unsolved mystery, he begins to notice strange shadows flickering around the house, each accompanied by disembodied whispers. As he investigates the origin of these shadows, he must navigate through the darkened corners of his mind, confront his most haunting failures, and ultimately unveil a conspiracy that challenges his perception of reality. The choices made impact not only the story's outcome but also the detective's mental state, leading to multiple endings based on how truthfully he confronts his own past.