Ryo Murasame is an aircraft pilot, one day he was taking his sister out on a ride along the Amazon when they were shot down by an UFO. They survived, captured by the Badan Empire with his sister killed while Ryo became the Combat Roid known as ZX. His memory is erased by the Badan Empire and worked as their agent of evil. This does not last long as an accident occurs which causes Ryo to regain his memory and escapes Badan. A year later, Ryo begins his attack on Badan as they finish the preparations on their doomsday weapon: the Space Break System. However, a coordinated attack by the Kamen Riders disables the Badancium 84 supplies needed for Space System to work When Ryo arrives, he thinks Kamen Rider V3, Riderman and Kamen Rider Super-1 are enemies until they get him to listen as only one truck full of Badancium 84 makes it to the Badan's base run by Ambassador Darkness.

雑誌掲載だけのオリジナルヒーロー・仮面ライダーゼクロス（ZX）が活躍するTVスペシャル。村雨良が変身するパーフェクトサイボーグ、仮面ライダーゼクロスの誕生と暗黒組織バダンの出現に加え、9人の歴代仮面ライダーが総登場。潮健児も新たな敵・暗黒大使に扮して歴代ライダーと戦う。

Ryo Murasame, un piloto de avion, y su hermana pasean por el Amazonas cuando un ovni los derriba. Sobreviven y son capturados por el Imperio Badan. Su hermana es asesinada, mientras que Ryo se convierte en la Combat Roid conocida como ZX. Su memoria es borrada por el Imperio Badan, y él trabaja como su agente del mal. Esto no dura mucho; Ryo recupera su memoria y escapa de Badan. Un año más tarde, Ryo comienza su ataque contra Badan cuando terminan su arma del día del juicio final: el sistema Space Break.

　　村雨良跟姐姐在一次旅行时不幸被暗黑大使率领的组织·巴丹的所捉，姐姐被杀害，他则被改造成机器假面骑士·ZX。但由于改造时发生意外，良的意识被唤醒，并趁机逃脱。知道自己身体被改造后的良十分愤怒，并决心向巴丹报服。

　　在一次追查巴丹的过程中良认识了其他的假面骑士，开始知道了像他那样的改造人不止一个，同时也在假面骑士们的口中得知巴丹的巨大阴谋：利用時空破断系统企图将世界毁灭！为了阻止巴丹的阴谋，十个假面骑士一起展开了作战！