Batman battles his archenemy, the Joker, who instigates an elaborate plot to seize control of Arkham Asylum, trap Batman inside with many of his incarcerated foes, and threaten Gotham City with hidden bombs.
When part of Gotham is turned into a private reserve for criminals known as Arkham City, all hell is sure to break loose, and the Dark Knight is the only one who can stop it.
Years before the Arkham incidents, the neophyte Dark Knight finds himself the target of an open murder contract courtesy of Black Mask that draws eight of the world's deadliest assassins and a new criminal named The Joker.
With his back against the wall, Batman turns to his closest allies to help him save Gotham City from the clutches of Scarecrow and the Arkham Knight's army. A familiar face also returns to give The Dark Knight a message he cannot ignore.