The most diabolical characters in Gotham City are reunited in the Arkham Asylum: Joker, Penguin, Two-Face and more. They plot terrible plans to take over the city! But Batman and his allies have infiltrated their team to stop their criminal endeavours. As a villain, you have one goal: have your plans come to fruition with the help of your co-conspirators. But beware, Batman and his sidekicks will do everything in their power to stop you. Use your powers, do evil and uncover Batman! — description from the publisher (translated)