The Joker uses a new weapon that turns anything into rubber or putty; the police chief wants Batman arrested.

Batman investigates a villain known as Clayface, who is able to transform into other people.

A mysterious villain known as the Riddler challenges Yin, secretly helped by Batman, to a number of riddles. Things are not what they seem from the riddles...

Firefly and Mr. Freeze team up to put their devastating plan into action: permanently putting Gotham City in a never-ending winter. Once the policeman's gala charity ball is put on ice, it's all up to the Batman.

Joker takes Detective Yin hostage, but once captured he refuses to tell of her whereabouts. Convinced it's the only way to learn Yin's location before she meets her demise, Batman uses a device created by Professor Hugo Strange to enter the bizarre brain of the Joker in search of an answer.

Joker, Penguin, and Riddler battle over control of the city, until finally deciding to settle their differences by giving all of Gotham over to whoever is able to capture and discover the true identity of the Batman.