Kouta fights off a pack of Inves in the now Helheim flora-invaded Zawame City alone. There, he runs into a boy who asks him about soccer. Kouta, demonstrating the goal of Soccer and how it's a way of demonstrating your strength while allowing the losing side to improve and having the chance to also wins enlightens the boy. The boy then creates his own ideal world - a "dream" world that is a separate dimension from the original Zawame, focusing on the sport of Soccer.
As the boy teleports from place to place, Kouta is lured into a destroyed stadium. But upon further inspection, he hears chants of what appears to be a crowd and upon entering, he sees spectators everywhere. Kouta is informed of the situation from Mai about the All Rider Cup and Kouta changes into uniform. Defeating Team Baron, Team Gaim wins, moving one step closer to the All Rider Cup as well as what is rumored to be the power to grant any wish, the Golden Fruit. Peko, upset that Team Baron is lost is bitten by a dark grasshopper that landed on his back.
Kouta realizes that this world is not the Zawame he is familiar with as Hase, Sid, Takatora, and Yuya are alive and well. He also realizes that the word Inves and Helheim are unknown meanings in this world. Kouta also runs into the young boy from earlier who reveals that his name is Lapis. However, when Kouta tries to ask more questions, Lapis disappears in thin air. Mitsuzane discovers that his brother is alive and has a wife, causing Mitsuzane to remember the discrepancies in front of him with memories of his time in the original world. This memory conflict causes him to go undercover to discover the truth.
At Team Baron's loft, Peko, who envied both Kaito and Zack, starts to ramble about wanting the Golden Fruit before transforming into Kurokage Shin with a Genesis Driver to attack Zack. Kaito intervenes, but Peko is mysteriously enveloped in what appears to be Helheim vines and is reduced to nothing with his Matsubokkuri Energy Armor Part retracting back into the Matsubokkuri Energy Lockseed. Kaito spotted Lapis watching and disappears. Elsewhere, a rusted Lockseed recovers its golden color.
Meanwhile, at Charmant, Hase starts to attack Jonouchi, wanting more power and transforms into Kurokage attacking even Oren. However, the same Helheim vines envelops Hase and he too is reduced to nothing with his Matsubokkuri Armor Part retracting back into his Lockseed. Kouta, appearing at Charmant realizes that Lapis was watching from afar. Catching up to Lapis with Kaito and Zack, Zack blames Lapis for Peko's death and attacks Lapis, but is also enveloped in Helheim veins before being reduced to nothing as well. His Kurumi Armor Part retracts back into the Kurumi Lockseed afterwards. Kaito calls out Lapis, but is unable to find him.
Elsewhere, Oren calls out one of the Armored Riders who he believes is behind the disappearances of his allies and rivals. At the Yggdrasill Corporation, Sid is attacked by Takatora, who realizes that the former has been plotting to betray him. The two fight on top of an elevator shaft with Zangetsu Shin knocking Sigurd off the platform with Sid being enveloped in Helheim vines before being reduced to nothing. His Cherry Energy Armor Part retracts back into the Cherry Energy Lockseed. Mitsuzane finds a recording left by Ryoma Sengoku who had been attempting to experiment on an artifact that he found.
Oren and Jonouchi rallies among his private militia against Takatora and the Kurokage Troopers resulting in a battle that destroys Zawame City. Kaito also enters the battle and Jonouchi is killed by Takatora. Oren, Takatora, and Kaito all activate their Driver finishers with Takatora and Oren dying while Yoko Minato saves Kaito and throws his Banana Lockseed onto the ground to give the illusion to the culprit that Kaito had fallen. Lapis, watching from afar is confronted by Mitsuzane, however Sagara appears before them explaining what is happening and how Kouta is in danger.
Kouta at the outskirts of where Zawame City was unaffected is confronted by Yuya, who asks why Kouta isn't yearning for the Golden Fruit like the other Armored Riders. Mai follows Kouta, but Kouta stops Mai from going to Yuya's side by revealing that Yuya isn't really Yuya. Kouta reveals that he found it weird how he was Gaim in this world if Yuya was always the original intended user for Kouta's Sengoku Driver. Yuya stated that Kouta was the best choice. Kouta asks Yuya why does he have a Lockseed if the Lockseed's purpose is to be used alongside a Driver. Yuya then says he needs it to protect himself from Inves. Kouta, now confirming his theory tells Mai that this man isn't Yuya. Yuya turns into Kougane and calls himself the "God of the New Generation" using the Golden Ringo Lockseed to transform into Armored Rider Mars before attacking Kouta. Mai flees with Kouta and Kougane fighting inside the destroyed Zawame. Kouta finds the Lockseeds of Takatora, Oren, Jonouchi, and Kaito, swapping between Banana Arms, Donguri Arms, and Durian Arms against Kougane. However, Kouta gains the upper advantage on Kougane with Jimber Lemon Arms causing Kougane to use Yuya's appearance to lower Kouta's guard. Kouta is enveloped by the Helheim vines with Kougane being angered that Kouta wasn't fully consumed.
Mai runs around the wreckage of the now destroyed Zawame to find Kouta. She becomes relieved when she sees him, but Mitsuzane tells Mai that Kouta has already fallen. Transforming into Ryugen against Kouta's "Black Jimber Lemon Arms", he is easily defeated. Mai notices Lapis and the two are confronted by Kouta. However, Yoko Minato and Kaito appear to join the fight, but the two are easily defeated by both Kouta and Kougane. Lapis reveals to Mai that his real name is Shamubishe and he is what they call an "Over Lord". Lapis enters Kouta's mind revealing to him that they're not so different, that they had the same goals while showing him his memories of Demushu, Redyue, and Rosyuo. Lapis reveals to Kouta that he's not in Zawame, but rather a world that he created that is like a dream - it's not connected to Zawame and that the Helheim threat is still real and active. Kouta breaks free of his brainwashing and confronts Kougane telling him that "there is no real gold in you". Kougane is overpowered by Gaim Kachidoki Arms and transfers all the Armored RIders into a desolate wasteland.
Lapis, encouraged by Kouta's strength and his will to never give up, conjured a horse for him to use. Kouta transforms into Kiwami Arms. Kougane and Kouta clash with Kouta managing to defeat Mars in his Flame Horse form, reviving the Riders that he considered his allies (Sid and Ryoma were never considered his allies or friends). Lapis is then given a Silver Ringo Lockseed by Sagara and the remaining Armored Riders transform into their respective forms. Kougane is destroyed by a Rider Kick from Kouta and the world starts to fall apart.
Lapis expresses his gratitude towards Kouta and tells him he can finally “rest”, and then he disappears. Kouta, back in the half destroyed Zawame, says goodbye to Lapis and promises to save this Zawame as well. Deep in the Helheim forest, the wind blows to reveal Kamuro’s spear and Lapis’ bracelet, rusting, appearing as if they've been there for a long period of time. Along with those items, a soccer ball stays idle near them.
imdb:tt3753372
