Kamen Rider Black Sun

Sacred stones are implanted in the bodies of two boys. Decades later, the world is divided. There are those who want to eliminate the "kaijin" and those who want to coexist with them. In the midst of this, there is a man, Kotaro Minami who’s somewhat a recluse. A young activist, Aoi Izumi wants to change the divided world. When Aoi and Kotaro meet, the time which had stopped begins to move again…

Prime minister Shinichi Dounami wields his power, as he lines his pockets through the kaijin business, taking advantage of the needy and minorities. The Gorgom Party, a political party linked to Dounami, sends an assassin to Kotaro with an order to recover the Kingstone. Nobuhiko takes action, but what is his true purpose?

After the attack, Aoi and Kotaro find themselves in a strange relationship. Meanwhile, Bilgenia, who had obtained video evidence from Kawamoto, the wanted man doesn’t tell Dounami about it. In the midst of all this, the protest that Aoi participates in develops into violent clashes and chaos. Then suddenly Nobuhiko Akizuki appears, insisting on the rights of the kaijins and rousing them to action.

Nobuhiko, together with the kaijins he gathered, tries to recover the former Gorgom. An old friend visits him and informs him that the Kingstone is under Aoi's care, so he goes to Kotaro... Meanwhile, Aoi is happy to see her father, Hideo Kawamoto again. However, Aoi is suddenly pursued relentlessly by her father who has turned into a kaijin. But she is saved by an unexpected person.

Kotaro remembers Yukari's words about defeating the "Creation King". In his hometown, a facility for experimenting on kaijins remains, and Bilgenia awaits them. Aoi and her mother are taken captive. Kotaro tries to rescue them, but a "Mantis"stands in his way. In the battle, he learns the truth and his hatred for Bilgenia grows, causing the Black Sun to manifest new powers.

The three priests conduct a ritual in response to Dounami's lamentation, but are rejected by the "Creation King". Meanwhile, an attack on the Gorgom Party is carried out. Darom clashes with Kotaro, but to protect the "monsters" he pleads for the succession of the "Creation King.” Meanwhile, Aoi and her childhood friend Shunsuke Komatsu free the captured people and try to escape…