Leopard is a descendant of Doronjo, who led a group of thieves called Doronbow. After coming to hold a grudge against Yatterman, she calls herself Doronjo and forms a new Doronbow, together with the descendants of Doronjo's underlings.

After being attacked and falling into a lake, Doronjo and the gang manage to survive. Doronjo comes to realize that in order to change the world, people need to be told the truth about Yatterman; however, no one believes what Doronbow has to say.