ZAIA Enterprise CEO Lyon Arkland has taken away Jin from Metsuboujinrai.net. A large number of soldier-type Humagears "Sold" were seen by Naki and Ikazuchi while rescuing Jin. The intention of Lyon 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, who was captured by Lyon? According to Lyon's plan, the being that poses the "greatest threat" to humankind is about to be born in a surprising way.[1]