A mysterious villain has kidnapped hundreds of the homeless people of Gotham City and turned them into an army of mutated half-crocodile zombies led by Killer Croc, and when Batman himself is infected he must find a cure before it is too late.

"The Gotham City Zoo has gone bananas! With Gorilla Grodd on the loose, Batman and Superman must join forces to put an end to the monkey business and save Gotham City"--P. [4] of cover.