OOO, Den-O, All Riders: Let’s Go Kamen Riders

Three Mole Imagin are battled in the present when Naoki is pulled into a time leap that drops him in 1971. Eiji Hino and Kotaro Nogami, aboard the DenLiner with Teddy, chase the anomaly across time. Ankh convinces Eiji to join Nogami's mission, while the DenLiner's owner warns them to stay aboard to avoid altering history.

In 1971, Nogami eliminates the Mole Imagin while Ankh makes a daring move to steal Core Medals from the living machines. The DenLiner crew recovers the stolen medals, restoring order for the moment. However, Ankh accidentally drops a Cell Medal, which a Shocker Combatman finds and hands to General Black, signaling a new threat.

Back in the present, Ankh and Eiji pursue Naoki, Mitsuru, and Shigeru after a casual pickpocket leads to a collision with Shocker-aligned police. The group escapes and reunites with the kids, but the broader threat becomes clear: Shocker has already manipulated Japan and joined forces with enemies of various Kamen Riders to push a world-dominating agenda.

Shocker closes in, and the DenLiner crew is pinned by a brutal chase as Hino fights on. He is overwhelmed by Shocker's elite riders, Kamen Rider 1 and Kamen Rider 2, in a display of power that threatens to derail their mission.

The DenLiner rescues the team, and the truth about Shocker's plot lands hard: they seized a Core Medal in 1971 and fused it with the Cell Medal to create the Shocker Greeed, a force strong enough to derail the Riders' momentum. Hino volunteers to keep fighting, but Nogami pushes him into a time jump that drops him into an altered present where he meets Hina Izumi. Mitsuru, Naoki, and Ankh remain hidden in the changed world.

In the past, Nogami recovers the Cell Medal, but Ankh drops another, which Nokko, a Kamen Rider Scout, mistakes the DenLiner crew for Shocker agents. She reconnects with her fellow Scouts, while Black seizes the Cell Medal, tightening Shocker's grip on the timeline.

Nogami and Momotaros clash with Black's forces while Mitsuru and Naoki escape with the Scouts. The Riders orchestrate a plan: 1 and 2 shield the escapees and deliver Black a fake Cell Medal with a transmitter to locate Shocker's headquarters while Nogami destroys the original Cell Medal.

The group reaches Shocker's headquarters, only to walk into a trap. Black unleashes the Shocker Greeed to assault them, while the DenLiner endures a brutal outside assault as it struggles to retreat.

Naoki and Teddy manage a brief boarding of the DenLiner during the chaos, then jump off to save others as the train returns to the altered present and rejoins Hino. The two worlds collide, forcing the riders to confront the consequences of their mission.

The group retreats to a hidden hideout where a time capsule holds a letter from Naoki. It reveals Teddy's selfless sacrifice—he gave his life to bring Naoki, Mitsuru, and Ankh to safety.

The next day, Shocker moves to publicly execute captives. Shigeru returns Hino's Rider gear, and 1 and 2 appear to help unravel the conspiracy. A turncoat Shocker scientist undoes the brainwashing that bound the Riders, triggering a wave of public rebellion.

A coalition of allies—Kikaider, Kikaider-01, Inazuman, and Zubat—joins the fray to repel Black and the Shocker Greeed. Hino gains new Rider powers and weakens the Great Leader as he transforms into Rock Great Leader, who is ultimately destroyed by the surge of Riders.

In the final twist, Naoki reveals himself as an older version of Naoki who once lived in the past, married Nokko, and became Mitsuru’s father. The threat is neutralized, and Hino bids farewell to Nogami as the DenLiner continues its journeys. The world is saved—for now—and the headline waits for tomorrow.