Forced by the reanimated Ra's al Ghul to choose between the son he has raised, and the son he fathered with Talia... to determine which will live, and which will serve as the vessel for the Demon's Head... Batman finds a third option. He agrees to lead Ra's al Ghul to the shifting city of Nanda Parbat, and the Fountain of Life. But waiting for them there is the Sensei, a martial arts master older, and more skilled than even Ra's himself.