THE DARK KNIGHT battles his greatest threats yet: cold-hearted MR. FREEZE, venomous POISON IVY and the unstoppable brute known only as BANE. BATMAN finds himself at odds with his crimefighting comrade ROBIN, no longer satisfied with his role as a sidekick. As MR. FREEZE threatens to unleash a new ice age upon the citizens of GOTHAM CITY, the DYNAMIC DUO, now joined by the heroic newcomer BATGIRL, must learn to work as a team before GOTHAM CITY is put on ice.