Horrors, both natural and supernatural, await Batman on the journey to save his son! Gotham City has many dark secrets, and no one knows them better than Bruce—but with Damian trapped somewhere in its labyrinth of shadows, the demons, forgotten skeletons, and memories of despair that line the city are more of a threat than ever before. The clock is ticking, and Batman must interrogate the demon Etrigan if he has any hope of rescuing Damian. Will Batman be able to save his son before time runs out?