Kai Nagisa, a normal high school girl who wishes to one day become a professional wrestler, is suddenly approached by a robot known as an Iczel. Iczel urges her to help save the Earth from invading aliens called Geas. The Geas, led by Chaos and Cross, are bent on stripping Earth's resources and then destroying it. To fight the invaders, Nagisa must merge with Iczel and become a battle-suited warrior named "Iczelion". She is reluctant to take up this sudden unbelievable task and fight with the other Iczelions of Earth because Nagisa just wants to live a normal life without having such big responsibilities. Nagisa must overcome her fears and fight, together with other Iczelions, to prevent the invading alien forces from destroying their homeplanet, Earth.

在與帝愛(ài)組會(huì)長(zhǎng)兵藤和尊（津嘉山正種 配音）的對(duì)決中，伊藤開(kāi)司（萩原聖人 配音）馬失前蹄，欠下對(duì)方高達(dá)一千萬(wàn)日元的債務(wù)。由于無(wú)力償還，開(kāi)司被帝愛(ài)組投入地下的設(shè)施內(nèi)進(jìn)行強(qiáng)制勞動(dòng)。在接下來(lái)的15年里，他將毫無(wú)希望地在這所人間地獄內(nèi)工作直到還清所有帳務(wù)。而逃出這里的唯一希望就是那張“1日外出券”。地獄有地獄的法則，外出券需要付出相當(dāng)大數(shù)額的代筆來(lái)獲取。為了那一線希望，開(kāi)司再次投入賭局之中。相比地上世界的賭坊，這里充滿了更多的欲望、貪婪、誘惑以及罪惡。對(duì)開(kāi)司來(lái)說(shuō)，這無(wú)疑是一次刀尖上的舞蹈……本片根據(jù)日本漫畫家福本伸行的原著改編。

喜歡槍枝的不良少年．一之瀨四季在某天突然變成了「桃太郎機(jī)關(guān)」驅(qū)除追殺的目標(biāo)，這是因?yàn)樗鋵?shí)繼承了鬼的血統(tǒng)！而將其扶養(yǎng)長(zhǎng)大、沒(méi)有血緣關(guān)系的養(yǎng)父原來(lái)以前曾經(jīng)是桃太郎機(jī)關(guān)的成員之一！在知曉這些驚人真相的同時(shí)，四季的養(yǎng)父也遭到桃太郎機(jī)關(guān)的成員．桃屋重創(chuàng)，但這樣的慘劇竟然導(dǎo)致四季過(guò)度憤怒而爆發(fā)出潛藏的力量…！