Kamen Rider Odin uses Time Vent to correct an error in Time but appears to inadvertently send Shinji back in time also. Shinji attempts to save the Riders by changing the flow of time but fails.

News reporter Shinji Kido is drawn into a case involving a series of abductions involving reflections when he suddenly found a mysterious deck left by the individual in the victim's apartment. As Shinji tries to figuring out the cause of this mystery, a mysterious woman and a man with a black coat pursues Shinji, asking if he was a Kamen Rider.

Having become a Kamen Rider himself, Shinji tries to discover more from another Rider and his female partner as the mysterious dragon continues to pursue him while his female partner talking about her brother's existence. Having witnessed the battle he participates, Shinji decided to participate in the war as Kamen Rider Ryuki.

Shinji discovers the truth of becoming a Kamen Rider and the battles yet to come while a school becomes haunted by the emergence of a pack of Mirror Monsters. Suddenly, a mysterious figure from the mirror appears in front of Shinji, urging him to fight for his own destiny.

When Darkwing appeared to scare a student, Shinji inquires further about Ren after suspecting that he had a darker intention in his means as a Kamen Rider. However, Yui denies Shinji's accusation about Ren's act as Yui explains to Shinji about Ren's true purpose of fighting.

Shinji investigates an antiques shop where Reiko was attacked by a mysterious person when she investigates the mystery of antique shop owner's disappearance. In order to meet a mysterious person, Shinji gave mysterious person a name card, without realizing that Shinji's action had putting Yui's life in danger.

As Ren tries to close in on the antique store murderer, Shinji unknowingly gives Kamen Rider Scissors the fuel for gaining an edge in the Rider Fight.

Yui is pursued into finding a man by her visiting grandmother, while Shinji encounters a lawyer who brings forth trouble around every corner. In the meantime, Reiko meets an old man who claims he owns some of the mutated species he found near a river bank.

An investigation leads Shinji to find out more on Shuichi while trying to prove his worth to Yui's grandmother to get a new place to stay.

Shinji is arrested after being falsely accused for abducting Nanako, leading to Yui and Ren hiring Shuichi to bail him out. However, as Shuichi attempts to free Shinji from his false accusation, he suspects that Shinji was Kamen Rider Ryuki.

Discovering Shuichi is Kamen Rider Zolda, Ren tries to back out of using the lawyer in saving Shinji, even as Shuichi goes through a crisis of morality and mortality. While Nanako is finally recovered from her last assault, she discovers a shocking discovery about Shuichi.

Shinji pursues Ren after he loses his memory while Yui returns to her brother's university in an attempt to locate his whereabouts. In the meantime, Reiko is investigating the mysterious disappearances of several passengers on a train.

Ren's past comes to light as both he and Yui return to Shiro's last known whereabouts and the birthplace of Kamen Rider Knight, as well as Eri's fate following the secret experiment's aftermath. When Yui finds nearly dead Professor Ejima in the Room 401, he blames Yui for causing a disaster before he dies.

An investigation into elevator abductions leads Shinji to encounter the one he thinks is Zolda while Ren encounters a fortuneteller who wants to stop the Rider Fight. As Shinji encounters Zolda, he accidentally unleashes the finisher that 'killed' Zolda in the process.

When Shinji learned that Zolda is actually Goro, Shuichi blames Shinji for his actions, making him believe that he killed Zolda in the previous fight. Learning from the troubles Shinji suffered, Ren arrives to clean up his name by exposing the true culprit behind Zolda's death.

With Yui hired as a part-time journalist following Chief Editor's absence, Shinji and Yui investigate a series of incidents involving masked men fighting each other controlled by a cruel gamemaster. Meanwhile, the fortuneteller predicts something terrible would happen to Ren if he continues to fight.

The ORE Journal is in jeopardy when Jun Shibaura suddenly appears and becomes the new Editor-in-Chief, only to reveal his plans to use ORE Journal to promote the fatal fighting game to the subscribers in larger scale. To make matters even worse, Jun threatens Shinji by attempting to burn the Dragreder card he stole from him if he tries to turn against him. Ren puts his duel to Jun to decide who's the strongest, while Miyuki warns Ren about the terrible fate that might happen to Ren if he continues to fight Jun.

With Ren doubting his ability to go through killing other Kamen Riders, Shinji and Miyuki contemplate his possible paths and the potential doom that he faces. As Sanako decided to go out for her 'secret association meeting', Yui continues to investigate the truth behind the secret experiments her brother conducted. Meanwhile, Shuichi attempts to release a prisoner.

Imprisoned criminal Takeshi Asakura is approached by Shiro in joining the Rider Fight to grudge against lawyer Shuichi Kitaoka who refuses to release him. Meanwhile, after Yui saw Eri's terrible condition in the hospital, she blames herself for causing this disaster. With the breaking news of Takeshi's sudden jailbreak spreading across the nation, Shinji ride into his action as a journalist for the first time.

Shinji becomes trapped with Takeshi as he holds hostages in order to gain a battle with his former lawyer Shuichi. Meanwhile, in Atori, Jun invites Ren and Miyuki to participate in a game that gathers all Riders together in the Mirror World for one big battle, only to realize that the game he held has backfired on himself.

Shinji questions Takeshi on why he enjoys killing people for his own satisfaction without thinking about others. In the real world, Shinji is surprised when Ren suddenly decides to help Takeshi evade being recaptured by the police. Meanwhile, Yui tries to uncover more secrets about her brother's experiments when she finds a film containing an image of the house she obtained from a research file. As Shinji battles against Takeshi once again in Mirror World, Ren suddenly appears and attacks Shinji.

After discovering Ren's reason for entering the Rider Fight, Shinji hesitates if he should fight or not. Meanwhile, Yui and Miyuki make a discovery at the old mansion that is connected to her and Shiro's past. As Ren prepares another battle with Takeshi, Shinji appears in front of them, deciding that he will fight Ren till the end.

As Ren tries to learn about Yui's past, Miyuki felt time is running short when Shiro targets him for death for disobeying his desires for the Rider Fight. In the meantime, Takeshi kidnaps Goro to force Shuichi to fight him face to face.

Ren battles with Shuichi in the Mirror World to decide who will survive. Miyuki reveals his past to Shinji as he contemplates the costs of changing destiny, as Shiro orders Takeshi to eliminate Raia for his refusal to fight. In the meantime, Reiko goes out to investigate Takeshi's disappearance.

Reiko tracks down and investigates Takeshi in order to find out the truth behind his aggressive, vexed behavior, only to discover that Takeshi had a long-lost brother who still lives. Following Miyuki's death, Shinji blames himself for letting Miyuki die in Takeshi's hands. Disgusted by her brother's reckless action, Yui decides to revisit the old mansion, urging Shiro to stop the Rider War. While Ren, Shinji and Shuichi battle against Mirror Monsters, they discover that the Contract Monsters they owned suddenly disappeared, when Shiro appears telling them that the Rider War is over.