The Outsiders, led by Kamen Rider Zero-Three, confront Kamen Rider Zein. Then, an assassin sent by Foundation X, Kamen Rider Evol-X, appeared. Misora Isurugi sounded the alarm against the spread of the Kamen Rider Chronicle to world, while Gai Amatsu and Brain visited Kuroto Dan, each united to fight against further threats. Meanwhile, Yuto Sakurai, who has lost control to the artificial intelligence Zein, struggles between his own goals and those of Zein. In the midst of all this, Foundation X's true objective is revealed....