After picking up the T2 Gaia Memories from
Jun Kazu,
Foundation X agent Tabata leaves the city of Fuuto for his organization's headquarters, only to be attacked by
Katsumi Daido, leader of the terrorist organization
NEVER, who steals the Eternal Memory and transforms into Kamen Rider Eternal. Tabata activates the Memories' case's self-destruct function, killing himself and scattering the remaining Memories throughout Fuuto while Daido reunites with his allies -
Kyosui Izumi,
Reika Hanehara,
Gozo Domoto, and
Ken Ashihara - who find four of the Memories and turn into
Dopants. Sometime later,
Philip becomes curious about mother-child relationships due to his last encounter with
Shroud before witnessing two previously defeated Dopants attacking people. While Philip holds the monsters off, a woman reminiscent of Shroud assists him until his partner Detective
Shotaro Hidari arrives so they can transform into
Kamen Rider W and defeat the monsters while the Cyclone Dopant saves the civilians. Upon reverting to human form, "
Watcherman" and "
Santa" reveal they were forcibly transformed by strange Gaia Memories before the woman reappears and claims she is
Maria S. Cranberry, an
Interpol agent sent to investigate NEVER and the T2 Memories. While comparing notes, Philip becomes intrigued by Maria and believes she is Shroud. Hidari, Philip, and their allies recover 17 more T2 Memories, but Hanehara, Izumi, and Domoto attack them until the Cyclone Dopant rescues them. While conducting research into NEVER, Philip discovers its members are actually undead super-soldiers called "Necro-Overs" before receiving a call from Maria telling him to bring the T2 Memories he found to the Fuuto Tower. Philip arrives, but is briefly captured by Daido. Philip and an arriving Hidari fight Daido while their ally
Ryu Terui fights Ashihara, but the trio are overpowered by their opponents before Daido uses the Eternal Memory's power to negate non-T2 Memories, de-powering the trio. Maria reveals herself as the Cyclone Dopant, having found the T2 Cyclone Memory, and her true allegiance with Daido to the trio before joining NEVER in converting Fuuto Tower into the X-Bicker device so they can turn Fuuto's citizens into Necro-Overs. While recovering, Terui informs his allies that NEVER is offering a reward for the last missing Memory, which has caused anarchy in Fuuto. Hidari and Philip argue over whether Maria can be trusted before Philip goes to find her. However, Daido reveals she is his mother before knocking Philip out. Returning to his office, Hidari finds
Kamen Rider Skull leaving behind his Lostdriver, making the former realize Philip wants a family of his own. Hanehara attacks Hidari again, revealing Daido has Philip. In the ensuing struggle, Hidari finds the last T2 Memory, uses it with the Lostdriver to transform into Kamen Rider Joker, and defeats Hanehara. Joined by Terui, Hidari heads to Fuuto Tower to save Philip and stop NEVER, defeating Domoto along the way. While Terui fights Izumi and Ashihara, killing the latter in the process, Hidari finds and reconciles with Philip, but loses his T2 Memory to Daido, who uses all of the T2 Memories to activate the X-Bicker. A dying Hanehara returns to beg for Daido's help, but he rebuffs her as she and Domoto turn to dust. Outraged by this, Philip destroys the X-Bicker and negates the T2 Memories through willpower before Maria injects Daido with an anti-Necro-Over solution. Enraged, he fatally shoots her before escaping to take an antidote. Maria apologizes to Philip for using him and assures him that he can stop Daido. Hidari and Philip pursue Daido, but are stopped by Izumi until
Eiji Hino suddenly appears and offers to take their place. As Hino kills Izumi, Hidari and Philip confront Daido, who intends to use the X-Bicker's energy to reactivate the T2 Memories and destroy Fuuto. He knocks the pair off the tower, but they receive a power boost and kill Daido. As Fuuto celebrates NEVER's defeat, repairs to Fuuto Tower begin. == Spin-Offs ==