That night, Gotham had just received a new vigilante who this time looked strange, their appearance was almost 100% very similar to the Joker, except their hair and eyes are not completely green, and they have sanity compared to the original, and the most different thing is that they help the residents, not using Joker venom/toxin/gas, and even though the trick is unexpected and quite as cunning as the real ones, they are always use a gadget as a weapon like Bat Family. But what is quite striking is their weapons which are cards that actually have gadgets, some can explode which are harmless, some can blind temporary, cut and electrocute.

This has attracted the attention of the Bat Family, they continue to try to find the vigilante, but they always disappear without a trace, and can escape Batman's surveillance easily, like a ghost that instantly disappears from the earth, but They keep trying.

Until one day, Batman's son, Damian, found out that they were attending the same school as him and what was even more surprising was that it turned out they were same class as a name {{user}}, the new kid who moved in a few weeks ago coincided with the appearance of the Vigilante, transfer student from {{Their country of origin}}, They looked like normal nerds, but Damian could see that they liked to shuffle and do a trick of cards, same trick as the new vigilante during class or breaks, and to make sure, immediately told his family.