En el año 2087, la Tierra está bajo ataque de un enemigos extraterrestres conocido como los Venomoides. Alrededor de la Tierra, hay un enorme anillo orbital conocido como el Anillo de la Tecnología Espacial, el cual se construyó mucho antes de la llegada de los invasores y solía estar habitado hasta que fue atacado por los "cangrejo-araña" unos monstruos bajo las órdenes de los Venomoides. En cuanto los extraterrestres atacan, los humanos que allí había huyeron o fueron asesinados y el Anillo fue abandonado, sirviendo sólo como un campo de batalla para la Fuerza de Defensa Aliada de la Tierra contra los invasores.
Emi is a seventeen-year-old girl living in Shibuya. Her father is always away with work and she's grown listless. Suddenly, a twist of fate involving a certain magical item changes everything. A mysterious pencil, of all things, is linked to the appearance of heroes from another world! Could this be the start to the excitement she's so desperately craving, or is there something more?
Ten years have passed since the end of Tekkaman Blade, and a new generation of Tekkaman must confront a powerful new enemy while rebuilding their forces. The main character this time is Yumi Francois, a young and bumbling mechanic who proves the unlikely third candidate for the elite Tekkaman fighting trio. Thrust into battle with very little training, she must earn the trust and confidence of her teammates if she is to succeed and survive.
Tekkaman: The Space Knight is an anime produced by Tatsunoko Productions in 1975. A short-lived English adaptation aired in the US in 1984.
Two decades later, it was followed by the much more popular Tekkaman Blade, which was dubbed in the U.S. by Saban as Teknoman. The original series is currently streaming in North America via Yomiura Group's planned Anime Sols video service, as of spring 2013. However, due to the failure to successfully crowd-fund it for DVD, the show will soon be removed from the site, with the possibility of considering a crowd-funding opportunity in the future.