Dr. Reese Walker never expected her archaeological discovery to change everything. Now bonded with Echo, an ancient shadow being with a sarcastic streak, she faces a reality-altering truth: Shadows aren't just darkness, they're the key to human evolution. With her enhanced service dog, Atlas, at her side, Reese must stop shadow weaponization programs and save humanity from cosmic horror. If only Echo would stop criticizing your snack choices first. Sometimes, evolution requires dancing with your demons.