Kaito awakens in an alternate reality where Armored Riders compete in super-powered soccer games.

Having finally erased his brother's shadow, Mitsuzane descends into madness. Professor Ryoma returns to Zawame City and offers the Riders a secret passage into Yggdrasil Tower - but what's his true goal?

After Kouta escapes Yggdrasil's clutches, he has put a stop to a Beat Rider team using Inves to commit crime. Takatora confronts Mitsuzane about his secret life and shows him what Yggdrasil is truly fighting against.

In the corporate-owned Zawame City, dance teams compete for street cred. When Team Gaim loses their turf to the rival Team Baron, Mai and former member Kouta are called by Team leader Yuuya to check out a new gadget that might help them win their turf back. Instead, they discover Yuya missing and a portal to another world...

Kaito pursues the Over Lords but is overwhelmed by their strength. Kouta also decides to investigate the Over Lords, but his recalcitrance begins to test Mitsuzane's loyalty.

When Jonouchi despairs at his directionless life, Oren puts his protege through a grueling training regimen. Yggdrasil confronts Sagara's subterfuge. Who - or what - is Sagara?

Mitchy becomes Armored Rider Ryugen, Team Gaim's newest protector. But when Armored Rider Baron proves too much for Ryugen, Kouta must overcome his fear and rejoin the battle.

In her search for Yuya, Mai is trapped in the mysterious forest and finds an unlikely savior in Kaito. Now the two must work together to make it out - if the Inves don't get them first.

The Inves forest becomes a battleground between the Armored Riders as Kouta & Mitchy investigate Yggdrasil. What they learn teaches them this was never just a game.

Takatora gives his newly-recruited brother Mitsuzane a heavy task: defeat Kouta and take his Driver. When Kouta learns his sister is kidnapped, he has to face the combined might of Bravo and a new Armored Rider.

Sid learns of the fabled "Fruit of Knowledge", a cosmic power whose bearer can remake the world itself. The Lockdealer resolves to take it for himself from the Over Lord's leader Rosyuo. The violent Demushu escapes into Zawame City and unleashes a warpath.

Ryoma betrays Yggdrasil, leaking Project Ark to the world. Meanwhile, as Zawame City is left to fend for itself against hordes of Inves, the Beat Riders fight to protect the civilians left behind.

Zawame City is isolated from the world as Redyue turns it into her playground. Inves begin rounding up humans as part of a scheme to resurrect Rosyuo's lost Queen. Meanwhile, Yoko catches on to Mitsuzane's duplicity.

The Riders team up with Ryoma to break into Yggdrasil Tower to free Akira & Mai. Meanwhile, Mai tries to convince Rosyuo that mankind is worth saving.

Mai has fallen gravely ill, and the Golden Fruit inside her is the cause. In a desperate effort to save the only person left he cares about, Mitsuzane brandishes a dark power and crosses the point of no return.

With their leader gone, Sid sabotages Yggdrasil and goes rogue. Kouta begrudgingly agrees to help his enemies track the Lockdealer down, but has to contend with "Zangetsu Shin", who is secretly Mitsuzane in disguise. Meanwhile, Takatora clings to life in the hands of the Forest's ruler.

The apocalypse begins as Rosyuo unleashes the full power of the Helheim upon Earth. Kouta, Kaito, & Yoko plan an assault on Yggdrasil Tower to stop the Over Lords. Mitsuzane finally shows his true colors to Kouta.

Mai transcends her human form and embraces her cosmic role as Woman of the Beginning. Kaito - now an Over Lord - sets out to eliminate his old friends and take the Fruit of Knowledge for himself.

Team Gaim's win streak continues thanks to Kouta's new powers. But when Kaito becomes Armored Rider Baron, Kouta learns the playing field has been dangerously leveled.

The turf wars in Zawame City escalate when Armored Riders Gridon and Kurokage take the stage. Meanwhile, an eccentric ex-soldier takes notice of the growing conflict and decides to throw his beret into the ring.

The Armored Riders are helpless against the war-hardened Bravo. It's now up to Kouta & Mitchy to figure out how to stop Oren before the Beat Riders become history.

Mai tries to organize a live dance event to salvage the Beat Riders' reputation. Armored Rider Bravo crashes the party, and it's up to Zack to save the day without Kaito at his side.

Unless nothing is done, the Helheim Forest will consume Earth and mankind will go extinct. Mitsuzane pressures Kouta to keep this truth a secret. Kaito investigates a mysterious life form in the forest.

Mai forces Kouta to tell him the truth of everything - of the Helheim, and of Yuya. This enrages Mitsuzane, whose concern for Kouta warps into hatred. Kaito resolves to settle the score with the Over Lord Demushu.

In an act of jealous hatred, Ryugen knocks Gaim unconscious, only for Baron to intervene. Takatora reflects on the early days of Project Ark and his friendship with Ryoma. As Kouta tries to escape the forest, he's forced to cooperate with an old foe.