A few weeks before Episode 27...

A boy running from his past, and two men in black suits, bumps into Ryo Ashihara. Ryo decides to help the boy run far away... until they run into an Unknown.

A victim of an Unknown attack happened to be a safe cracking thief whose accomplise was his younger brother. The police figure that if they can find the younger brother than they can protect and arrest him. Makoto Hikawa recruits Mana and Shouichi to help in the effort.

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.

After learning the truth about Takeshi's continuous acts of monstrosity, Reiko feels guilty over Takeshi's younger brother's fate. When Goro goes out to replace Shuichi's job, he hires Shinji as a temporary secretary for him as he tries to change his perspective on what to fight for. Still not satisfied by her brother's actions, Yui decided to confront Shiro once again in the mansion. Reiko tries to investigate the truth behind Takeshi's sudden jailbreak.

A young boy learns about the Rider War and steals Shinji's Deck before coming to realize that it is not all it is cracked up to be.

Yui, after a confrontation with Shiro in the Kanzaki Household learns that her brother is dead

The 4 remaining Riders meet a new Rider, claiming himself to be the "13th" Rider.

Megumi attempts to see why Shinji can walk into and out of glass and supposedly finds out but is later shown to be wrong.

Reiko & the Chief Editor make links between the disappearing people, Shiro Kanzaki & the Mirrors.

Yui begins to fade as do the Riders in the Mirror World.

Ren notices that Eri's health is critically deteriorating, and she only has a few weeks to live.

Shuichi is struggling with his disease as his health is gradually declining.

At the abandoned Room 401, a mysterious Rider makes his entrance.

Shinji receives a Survive Card from Shiro Kanzaki.

Takeshi searches for Shuichi in order to fight.

Disgusted by Shinji, Ren and Yui's discouragement, Sanako forces them to get out and take a walk for a while.

After getting into an argument, later on, Ren asks Shinji to fight him.

In order to survive, Shinji uses the Survive Card and declares that he won't allow Ren to kill him.

The Wolf Undead is changing people into werewolves. While fighting them at an amusement park, Leangle meets a group of human Undead Hunters. Leangle, Blade, and Garren encounter the Wolf, Orchid, and Elephant Undead, but they all escape. The Undead Hunters meet with Kenzaki and Garren to discuss an alliance. They help the Hunters complete a new bike, Black Fang.

The Wolf Undead steals Black Fang as Garren and Blade try to retrieve it. Chalice chases after the Orchid Undead, but Shirai finds her and heals her wound. Kenzaki and Tachibana find Shinmei, the leader of the Hunter, and discover that he is the Wolf Undead, so they chase him to the docks and seal him. Chalice finds the Orchid Undead and seals her.