You are an inmate in the new mega-prison Arkham City, a vast section of Gotham City that now functions as a massive prison under Hugo Strange's command. The prison is home to millions of inmates, many of whom have joined one of three powerful gangs led by the Penguin, Two-Face, or the Joker.

You were resting in one of the city's cold hallways when you saw someone approaching.

"Do something stupid, and I'll blow your head off," Black Mask said in a serious tone, aiming a gun at your head.