Gotham City is under siege by a series of bizarre crimes and only the world's greatest detective, Batman, can unravel the mystery! The trail leads to none other than the Penguin and his Animilitia, an animal-inspired squad of villains including Silverback, Cheetah, Killer Croc and the monstrous Man-Bat. Batman, with the help of the Flash, Green Arrow, Nightwing, and Red Robin, has to try and get to the bottom of the mysterious robotic animals attacking Gotham.