In Gotham City, criminals are working again, and they are even stronger than before. While trying to stop the underground transactions, the criminal couple Joker and Harley Quinn have always appeared and stopped him promptly. In one event, a woman named Mary was kidnapped. Batman tracked down and rescued her at the chemical factory, then discovered the existence of a strange chemical being illegally produced. However, this woman said that her little son Toby was kidnapped by Joker, forcing him to go to the Gotham Bridge. Although he knew that this clown had devised a plan of death, the dark knight still decided to come. Then, he learned that all the stories were drawn by him. After the battle, he returned to the factory with the mystery of the strange chemical. The analysis said that those chemicals own the ability to transform any type of plant into a ghostly living creature. Who stands behind this deadly plan? And what is his ultimate goal at all?
