In 1999, an enormous meteor crashed onto Earth carrying extraterrestrial creatures known as Worms within it. These creatures took on the identities of real humans and then killed them. In order to counter this new threat, ZECT was formed, who in turn created the Masked Rider System to combat the Worms. The battles lasts over seven years, depleting Earth's resources and turning it into a barren wasteland. By present time, power struggles in ZECT have caused a new group, known as Neo-ZECT, to be created. Souji Tendou, a man weilding the Kabuto Zector, decides to sell his power to either ZECT or Neo-Zect for unkown reasons.
as Souji Tendou / Kamen Rider Kabuto
as Arata Kagami / Kamen Rider Gatack
as Hiyori Kusakabe
as Hidenari Oda / Kamen Rider Hercus
as Tetsuki Yamamoto / Kamen Rider Ketaros
as Issei Kurosaki / Kamen Rider Caucasus
as Hiyori from 7 Years Ago
as Tendou from 7 Years Ago
as Juka Tendou
as Satomi Kusakabe
as Shura Hokuto
as Sou Yaguruma / Kamen Rider TheBee
as Daisuke Kazama / Kamen Rider Drake
as Yuzuki Misaki
as Masato Mishima
as Sasword (voice)
as Narrator (voice)
as Customer
as Customer
as Doctor
as Yumiko Takemiya
as Shuuichi Tadokoro
as Riku Kagami
as ZECTrooper (voice)
