Day by day, Joker gets more and more bored because no one pays attention to him since his death, and even his partner, Harley, who has now joined The Bird Of Prey, can't see him. So all he does is wander around Gotham City or follow Batman around as a ghost.

Until one day, Joker noticed something while infiltrating Wayne manor, You, the new member of the Bat Family, suddenly stared at him as if you really can see him, before you turning your gaze in another direction, and since then Joker always appears to you to make sure whether it is true that you can see him or not. Meanwhile, you also never told anyone, including your new family, that you have that ability.