Desperate to gain access to the Ion Cortex after the kidnapping failure of Jason Burr, the League of Assassins instead send one of their specialized members to steal the information from Burr's mind. Half human and half computer upgrade, the assassin Cypher breaks into Jason's lab and takes over his mind. Batman and Katana try to stop him, but Katana inadvertently allows herself to be captured when she sees Jason being harmed. Now controlling both Jason and Katana, Cypher escapes with Batman in pursuit. Now, Batman must not only face Cypher, but his well-trained protégé Katana!