Someone has put a hit out on Gotham's toughest cop, Harvey Bullock. After surviving several near misses, Bullock realizes he has no choice but to ask his arch-rival Batman to help him discover who is behind the murder attempts. During their investigation, Bullock learns that his gruff and mean-spirited manner has created enemies in the unlikeliest of people.

The villainous Mr. Freeze kidnaps Batgirl. Now, racing the clock, Batman and Robin face off against Mr. Freeze in the iciest showdown of the century.