Batman discovers a mysterious teen-aged girl with superhuman powers and a connection to Superman. When the girl comes to the attention of Darkseid, the evil overlord of Apokolips, events take a decidedly dangerous turn.

Batman learns that he has a violent, unruly pre-teen son with Talia al Ghul named Damian Wayne who is secretly being raised by Ra’s al Ghul and the League of Assassins. When Ra’s al Ghul apparently dies after a battle with Deathstroke, Batman must work to stop his long-lost son from taking revenge and guiding him to a righteous path, in addition to the chance for the pair to truly acknowledging each other as family.