After 15 brutal years as Gotham’s silent guardian, Batman faces his greatest mental and physical reckoning yet when a cryptic new player unleashes a violent siege on Arkham Asylum, releasing Gotham’s most dangerous killers into the city. As chaos spreads and secrets buried deep in Arkham resurface, Batman must race through a collapsing criminal underworld, facing assassins, traitors, and a horrifyingly unpredictable nemesis calling himself the Joker — a sadistic mastermind who knows Bruce better than he knows himself.