In the treacherous frontier city of Samurai Town, a ruthless bank robber is sprung from jail by wealthy warlord The Governor, whose adopted granddaughter Bernice has gone missing. The Governor offers the prisoner his freedom in exchange for retrieving the runaway. Strapped into a leather suit that will self-destruct within five days, the bandit sets off on a journey to find the young woman—and his own path to redemption.
ZAIA Enterprise CEO Leon Arkland has abducted Jin away from Metsuboujinrai.net. A large number of soldier-model Huma Gears "Sold" were seen by Naki and Ikazuchi while rescuing Jin. The intention of Leon Arkland was to mass-produce "Sold" and sell them as weapons all over the world. Jin is indignant at the fact that Humagears are about to be used as a weapon, and tells the other members of Metsuboujinrai.net that he wants to free the "Solds". Four people who transform into Kamen Riders will fight to release the "Solds". However, something unexpected happened... What happened to Jin, while he was captured by Leon? According to Leon's plan, the being that poses the "greatest threat" to humankind is about to be born in a surprising way...
Nagisa lost her twin sister, Sayo, two years ago. Every day she prays at a local temple in Tokyo to speak to her sister. One night, on her way home, a strange taxi driver picks her up and takes her to another world, the land of the souls where she goes on a journey to reach out to her sister one last time.