Gotham City had suffered the results of a magnitude 7.6 earthquake in the earlier "Cataclysm" storyline. Previous disasters, such as two separate plague outbreaks, caused many to want to write off Gotham completely. The U.S. Government gave a timeline. At the end, all bridges were destroyed and all known paths out of the island city were covered by the National Guard. The Justice League of America were forbidden by law from entering the city. They kept busy defeating outside threats to the city, along with other crises. The situation inside was left to Batman and his allies; Superman offered his help in the city, but after staying for one day realized this was not the type of problem he could fix with just power. Upon the realization, he leaves Gotham in the hands of Batman, (although Superman, in the guise of Clark Kent, would appear again months later to check on Batman's progress).
The city was swiftly carved up by gangs and various supervillains Batman had battled over the years. Jim Gordon and several well known Gotham officers chose to stay behind and an unknown number of policemen willingly followed suit, all in an effort to protect the innocent people. Oracle and Huntress also ended up on the inside.
Huntress adopted the Batgirl persona in Batman's absence, realizing that Gotham needed 'Bat-Personnel' to keep the situation under control. As Bruce Wayne, Batman had left the city to try to solve the problem politically, using his name and money to convince the federal government to delay closing off Gotham. Unfortunately, his efforts failed, arguably because he appeared to the government as Bruce Wayne�an air-headed billionaire with little concern for serious issues�of which the No Man's Land was exemplary.
Some 100 days after the Federal Declaration of the No Man's Land, he returned to Gotham to reclaim the Batman title and his people, many of whom had long since given up on him. Even his former ally, Jim Gordon, believed that Batman had abandoned Gotham to the villains.
What Batman returned to was a state of unrest and disorder on a grand scale. Since there was no longer anywhere to spend it, money became worthless; people would barter anything from batteries to services to protection for daily necessities. It seemed the only person to have any use for cash was the Penguin, who had nightly events where those few with cash left spent it all on such rare and simple items as an apple. The Penguin, despite his riches and implicit opportunities to flee the city, instead opted to stay. He had his own mysterious link to the outside and apparently enjoyed taking advantage of the dire situation in Gotham.
With Batman being gone for so long, and his very existence debatable in the Gotham underworld, the Huntress was able to pass off as not Batgirl, but Batman himself to many of the criminals she faced. Following the example of the gangs in town, she even tagged by graffiti her territory with the bat symbol. She went back to her Huntress costume when the Dark Knight confronted her after her failure to hold territory against Two-Face's forces, without any pleasantries. The third Batgirl, Cassandra Cain, estranged daughter of assassin David Cain, made important contributions to the effort during this time, as well as starting a lasting friendship with the Oracle.
In an effort to redeem herself, the Huntress went to the aid of a church that was open as a hospital and sanctuary to anyone desiring it in Gotham. Having no protection because of their benevolent intentions, the church and its kind staff were sitting ducks. The Huntress' desires to use her expertise to protect them was seen more as an unnecessary and warlike show of force than as help, even when she was trying to halt the Scarecrow's machinations to sabotage the church's efforts.
The weaker gang-leaders fell first, mostly to Batman and or James Gordon's officers. Street by street battles were fought, with deaths on both sides. Eventually Gordon's forces split, with half the squad following the more violent Petit, who believed that the only solution was to meet violence with more violence rather than Gordon's more peaceful methods. Two-Face became a major warlord, acquiring and losing territory every so often, and caused major problems for the police. He kidnapped Jim Gordon, killing two of his guards, in revenge for breaking a previous alliance, although in the subsequent trial Gordon was acquitted by the defence of Harvey Dent, Dent concluding that since Gordon had been essentially blackmailed into the alliance the agreement was void. The Penguin, as previously mentioned, remained in the city and was approached by Mercy Graves, acting on behalf of Lex Luthor, to begin a rudimentary clean-up of the downtown districts for Luthor's eventual move-in. Poison Ivy took over Robinson Park. She ended up caring for numerous orphans and was left alone by Batman in return for providing food. Zsasz owned his own territory, as did Mr. Freeze. Bane, too, was involved indirectly as a strong man for Lex Luthor; he notably destroyed the Hall of Records to fulfill one of Luthor's goals. He also drastically reduced Two-Face's territory in the process, making him insignificant. Despite his status as a supervillain, the Scarecrow was welcomed into a church filled with refugees and manipulated various factions in a plot to send the church's refugees spiralling into fear and despair. The Riddler, strangest of all perhaps, actually fled Gotham and spent the year barely noticed. The Joker made the most of his rare appearances. He spent some time as the ruler of an apartment building filled with supplies. This ended up, naturally, with lots of dead people, many from his own gang. He later re-formed and attacked Petit's territory. During the attack, he captured several of Petit's men, dressed them up to look like him, and forced them to walk in front of Petit; the now-insane cop shot all of them without even confirming whether or not they were the real Joker. When Petit killed an officer who tried to desert, Huntress knocked him out, subsequently facing the Joker and around twenty of his men all by herself, suffering near-fatal wounds in the process before Batman and Nightwing showed up to help her.
When Lex Luthor's money illegally brought in an army of construction workers, the Joker tried to kill his share. Bane, employed by Luthor now, appeared again, protecting the innocent workers from death, maiming and worse.
Near the end of the saga, as a statement to murder hope with the news that the No Man's Land was intended to end on New Year's Day, the Joker decided to kill all the children born during the "No Man's Land" storyline. Sarah Essen, Commissioner Gordon's wife, ended up confronting the Joker alone in Gordon's police headquarters. While saving a baby from a dangerous drop to a hard floor, she was shot and killed. Gordon restrained himself from killing the Joker, opting only to shoot out his knee. The Joker, quite naturally, found this unspeakably funny, since it had been he who crippled Barbara Gordon.
Eventually, thanks in no small part to the financial and political machinations of Lex Luthor�dipping his hands, as ever, in both legitimate and illegal means to achieve his goals�Gotham City was released and rebuilt, and rejoined the United States.
Gordon and the surviving officers were reinstated as full policemen.
Much of the story line was narrated by Oracle, as she used her resources to become a low-tech version of herself. She used paper to document events and the passage of time, operatives and emergency phones (knowing which ones were still in operation) to gather intel, and maps colored by pencils to keep track of who controlled which portions of the city at a particular time. Her maps were frequently shown in the comics to help the reader follow the progression of territorial disputes (Gotham City maps in current series are based in large part on Oracle's maps from this series). Oracle remained one of the few people in the city with the ability to contact the outside world. In his own series, Hitman, Tommy Monaghan had found his own ways in and out of Gotham (he spent No Man's Land protecting his own few blocks of where he had grown up, putting out the skulls of vampires as warning signs).
Like Oracle, all of the characters got serious testing of their mettle. Commissioner Gordon became more of a general leading an army than a police officer and held a grudge against Batman, even after he had returned. It wasn't until nearly the end of the story line before they talked again, and Batman even revealed to Gordon his secret identity, in a gesture to regain his trust, but Gordon turned away without looking. He didn't want to know who was under the mask, and told Batman to put it back on.
The story ran through the following issues:
Batman: No Man's Land #0 - Ground Zero
Batman: No Man's Land #1 - No Law and a New Order (Part One)
Batman: Shadow of the Bat #83 - No Law and a New Order (Part Two)
Batman #563 - No Law and a New Order (Part Three)
Detective Comics #730 - No Law and a New Order (Part Four)
Azrael #51 - Miracle Run
Batman: Legends of the Dark Knight #116 - Fear of Faith (Part One)
Batman: Shadow of the Bat #84 - Fear of Faith (Part Two)
Batman #564 - Fear of Faith (Part Three)
Detective Comics #731 - Fear of Faith (Part Four)
Azrael #52 - Devil Down Below
Batman: Legends of the Dark Knight #117 - Bread and Circuses (Part One)
Batman: Shadow of the Bat #85 - Bread and Circuses (Part Two)
Batman Chronicles #16 - Two Down / The Comforts of Home / Harold
Batman #565 - Mosaic (Part One)
Detective Comics #732 - Mosaic (Part Two)
Azrael #53 - Jellybean Deathtrap
Batman: Legends of the Dark Knight #118 - Balance
Batman #566 - The Visitor
Detective Comics #733 - Shades of Grey
Azrael #54 - Step into the Light
Azrael #55 - Misery Dance
Batman: Legends of the Dark Knight #119 - Claim Jumping (Part One)
Batman: Shadow of the Bat #87 - Claim Jumping (Part Two)
Batman #567 - Mark of Cain (Part One)
Detective Comics #734 - Mark of Cain (Part Two)
Young Justice No Man's Land Special #1 - Road Trip
Batman: Legends of the Dark Knight #120 - Assembly
Robin #67 - Way Dark
Azrael #56 - The Night Foretold!
Azrael #57 - Scratched Out!
Nightwing #35-37 - Escape to Blackgate
Catwoman #72-74 - A Funny Thing Happened On the Way Back To Gotham ... / Ms. Direction / A Slight Detour
Batman Chronicles #17 - Little Bat Lost / Turn On, Tune In, Freak Out / Identity Crisis
JLA #32 - Inside Job
Batman: Shadow of the Bat #88 - Fruit of the Earth (Part One)
Batman #568 - Fruit of the Earth (Part Two)
Detective Comics #735 - Fruit of the Earth (Part Three)
Robin #68-70 - War Beneath the Streets
Batman: Legends of the Dark Knight #121 - Powerplay
Batman: Shadow of the Bat #89 - The King
Detective Comics #736 - Homecoming
Azrael #58 - Ghosts
Batman: Legends of the Dark Knight #122 - Low Road to Golden Mountain (Part One)
Batman: Shadow of the Bat #90 - Low Road to Golden Mountain (Part Two)
Batman #570 - The Code (Part One)
Detective Comics #737 - The Code (Part Two)
Batman: Legends of the Dark Knight #123 - Underground Railroad (Part One)
Batman: Shadow of the Bat #91 - Underground Railroad (Part Two)
Batman #571 - Goin' Downtown (Part One)
Detective Comics #738 - Goin' Downtown (Part Two)
Batman: Legends of the Dark Knight #124 - Captain of Industry
Batman: Shadow of the Bat #92 - Stormy Weather
Robin #71-72 - The Lizard King / Last Stand on Grand Avenue
Batman #572 - Jurisprudence (Part One)
Detective Comics #739 - Jurisprudence (Part Two)
Batman: Legends of the Dark Knight #125 - Falling Back
Robin #73 - The World Around the Corner
Batman: Shadow of the Bat #93 - Assembly Redux
Azrael #59 - Pilgrim's Return
Catwoman #75 - The Rules
Batman #573 - Shellgame (Part One)
Detective Comics #740 - Shellgame (Part Two)
Azrael #60 - Evacuation
Catwoman #76-77 - Strange Bedfellows / Payback
Batman: Legends of the Dark Knight #126 - Endgame (Part One)
Batman #574 - Endgame (Part Two)
Detective Comics #741 - Endgame (Part Three)
Azrael #61 - Presents of Mind
Batman: Shadow of the Bat #94 - Days of Auld Lang Syne