After being beaten by the El of the Wind, Ryo Ashihara and Shoichi Tsugami are nursed back to health by the two girls they helped.

As the Scorpio constellation continues to shift more and more people who were born under the constellation commit suicide. Makoto Hikawa believes that they die after seeing their doppelgänger.

The G3 and G3-X have been dispatched for the purpose of protecting Unknowns. The police believe that a race of Agitos will one day overthrow humanity so why not have the Unknowns kill them before it happens.

With people killing themselves because of the OverLord and two Els killing people with the Seed of Agito the Kamen Riders must unite their strengths to save humanity from extinction.