In a world where shadows have their own sentience, you play as Echo, a shadow-writer who can interact with the shadows of the living beings around you. The story begins when you receive an anonymous message from a shadow claiming that it knows the secrets of your past. As you delve deeper into the mystery, you’ll have to navigate a vibrant urban landscape filled with eccentric characters—both living and shadowy—and solve puzzles that change depending on how you manipulate the shadows. Your goal is to uncover the truth of your own identity before your shadow decides to break free and wreak havoc. The choices you make will affect both the living world and the shadow realm, leading to multiple endings.