東京大震災から10年、疎開先の中学に通う五十嵐丸太もクラスメイト達と平凡な生活を送っていた。だがある日学校に「赤い男」が現われ、丸太の運命は一転することになる。無実の罪で死刑宣告された丸太は、完全民営化刑務所「デッドマン・ワンダーランド」に送致されることに…。

　摘要

　東京大地震十年後，人們逐漸淡忘這場大災難所帶來的恐怖回憶，當時親身經?了這場災難的男主角「五十嵐丸太」，卻因當時的意外而喪失了記憶。現今的丸太與其他同學過著普通而平凡無奇的?一日，但這一切並未帶來永久的幸福，而是死亡的開始。某天，一名紅色男子「赤之男」突然現身學校，並將所有丸太的同班同學殺害，並置入一個紅色核心置入丸太的體?。原本見到事實的丸太以為將被赤之男殺死，醒來卻在?醫院得以倖存，但這活著卻徹底改變了他的一生命運。被拯救後的丸太，表面雖在辨護律師「玉木常長」?忙下，最後仍被末名冠上莫須有的罪名予以起訴，最後的判決竟是處以「死刑」，被強迫送至了民營化的監獄「DEADMAN WONDERLAND（亡靈幻境樂園）」。亡靈幻境樂園是以東京復興為目的，在日本建立了唯一的民營化刑務所，表面上是為了各種囚犯而建立，並讓人觀光的樂園，但其實是個利用死囚互相廝殺，並藉此吸引大量金錢投資，把擁有特殊能力的死囚做為實驗的不詳之地。在這充滿?望的「樂園」裡，丸太先與亡靈幻境的看守長「真紀奈」見面，了解了此樂園對各種刑犯的殘酷，並終身被監禁無法離開這座樂園，在?望的底下，與青梅竹馬的神秘少女「白」再次相遇，而這是否得到真正救贖？丸太對抗死亡命運的戰鬥就此展開……

　plot

Prior to the start of the story, a massive earthquake ravaged Japan's mainland and destroyed most of Tokyo, sinking three-quarters of it into the ocean. Ten years later, the story shifts to Igarashi Ganta, a seemingly ordinary, unassuming middle school student attending Nagano Prefecture's middle school. An escapee, a survivor of the great earthquake, Ganta has no memories of the tragedy and has lived a simple, normal life. This all changes one day when a strange man covered in blood and crimson armour appears, floating, out of his classroom windows. Smirking madly, this Red Man massacres Ganta's entire class and, instead of killing him, embeds a red crystal shard in his chest. Within days of the massacre, Ganta is declared the sole suspect and, following a suspiciously quick trial, is sentenced to life imprisonment in Deadman Wonderland, a massive theme-park-like prison.

Arriving at the prison, Ganta is fitted with a special collar which tracks him and monitors his life signs. Due to the heinous nature of Ganta's 'crime', he is also sentenced to live out his imprisonment under Deadman Wonderland's 'Death Sentence'. A lethal poison is constantly seeped into his body through his collar, which can be kept at bay by consuming a peculiar candy-like medicine every three days. Additional candy can be earned through hard work or through purchase. In order to gather Cast Points, the prison's currency, an inmate has to perform in the facility's lethal games and survive to claim his prize. Fortunately for Ganta, he is aided by a mysterious girl named Shiro, who apparently knows Ganta, and by other prisoners as well, namely a kleptomaniac named Yoh.

While trying to survive his daily ordeal as an inmate on death row, Ganta becomes increasingly obsessed with the 'Red Man' and tries to find him and clear his name. In an increasing bizarre twist, Ganta begins to develop a way to manipulate his own blood, to the point of turning it into a weapon. Unbeknownst to him, Ganta has become one of the prison's 'Deadmen', a segregated group of prisoners capable of controlling their blood. After his ability is discovered, Ganta is forced to participate into brutal gladiatorial death matches, known as Carnival Corpse, whose anonymous spectators pay large amounts of money to watch. In his struggle he manages to befriend some of those he fought off in the arena, and with them Ganta continues his quest to uncover the identity of the Red Man, why he turned into a Deadman, and the dark secrets the prison authorities are hiding.