The story is based around the capture and return of the Joker (voiced by Mark Hamill.) to Arkham Asylum. Batman (Voiced by Kevin Conroy.) accompanies him through the halls of Arkham during the opening credits. Once they reach a checkpoint the guards inform Batman that they have it all under control and he can’t enter. Reluctantly, The Batman sits back and watches the guards take him away. It isn’t too long before Joker makes his move. Knocking out the guards and making it passed the high security gates with the help if Harley Quinn (Voiced by Arleen Sorkin.) who has already stealthfully taken control of Arkham. This is where the game begins.