Batman: Ra's al Ghul - Year One

Plot

When Gotham City's hospitals, homes and streets begin filling with the undead, the Dark Knight is the only one with a chance to discover the secret behind their continued animation. Ra's al Ghul has left a world filled with miserable, self-aware, reanimated corpses for the Batman to face. In order to do so, he must follow Ra's al Ghul's centuries of secret world travels!