Batman's son, Damian, who has been fighting crime in Robin's persona, finds out that his father is missing. Nightwing has been disguising himself as Batman in order to keep up appearances. As the duo investigates Bruce Wayne's disappearance, even Alfred goes undercover to assist them. It's not long before they all become involved with the mysterious Batwoman, who may have been the last person to see Batman alive. But as the "Bat family" gathers evidence, they come to the inescapable conclusion that the Dark Knight has in fact gone over to the dark side, becoming Gotham's newest and most deadly crime boss.