An AI looks into the past, at an event long before Ray Starling set foot in the world of Infinite Dendrogram. The unstoppable Tri-Zenith Dragon emerges from the mountains. It is a bringer of death, wielding a miasma of desolation in its wake. The citizens of Altar can do nothing but watch as doom descends upon them. However... There are three who may be up to the challenge. Three Masters who, if they managed to work as one, could stop the imminent desolation of the land they call home. But with so much glory to gain, what could they stand to lose?

The City of Duels remains under siege, the situation worsening by the moment. Ray Starling takes his battle outside the city walls to stop the mastermind behind it all... But with Franklin’s menacing RSK standing in his way, Ray may have finally met his match! And even if he can overcome this insurmountable threat, will he be prepared for the Giga Professor’s “Plan C”?

The chaos at Quartierlatin subsides, and the kingdom begins to mend its relationship with the Masters. After a very long weekend, Reiji returns to college to work on his studies and mingle with his Dendro-playing friends. But as that happens, Hugo travels to Caldina to apprentice with a Superior. As he tries to level up, he finds himself embroiled in a major conflict with the local mafia... In Infinite Dendrogram, the storms never subside. They simply move elsewhere.

Answering a request from Moneygold, King of Revelry, Hugo and Cyco sign on as bodyguards for a trip aboard the luxury sand liner Eltram. The two of them know all too well that any task coming from a Superior can’t possibly be as simple as it seems, and their suspicions are soon justified when the sand-ship becomes a battleground for multiple rival factions. Just what plans do these organizations have for the sand liner—or is it the cargo they’re all after instead? Numerous Superior Jobs converge upon this jewel of the desert—The Weapon, Murder Princess, King of Burglary, and Over Pilot among them—each with their own schemes in motion. Hugo has no choice but to face the ensuing carnage...but can he emerge victorious in this capriccio on the sands?

Who needs peace and quiet when you have games to play? Ray's climb towards becoming a super paladin continues, but it's never as easy as anyone hopes. Ultimate Boss Monsters, cursed costume pieces, and positively mad penguin are just some of the grinds in his way ⁠— and that's not even including the dread specter of gacha mechanics. Can Ray keep his in-game life ⁠— and dignity ⁠— intact, or is he just another cog in the machine of Infinite Dendrogram?

Beastly hordes loom over Gideon as Franklin sends his Monster Factory into overdrive outside the city walls. while something stirs beneath the duel arena... Even with reinforcements at his side, Ray finds himself hard-pressed to handle the overwhelming numbers arrayed against him. A job like this calls for area denial on a massive scale—and luckily for Gideon, Altar's very own King of Destruction is ready to step up and bring his own brand of chaos to the battlefield.

Ray finds himself kidnapped by The Lunar Society, and is approached by their spiritual leader and the last Superior of the kingdom -- High Priestess, Tsukuyo Fuso, who begins to unfurl her nefarious scheme.

The [King of Plagues] is a disaster in human form that once roamed the world of Infinite Dendrogram, leaving only carnage in his wake. He destroyed an entire country and murdered [The Hero], the pinnacle of tian-kind...but not even that was enough to sate this walking catastrophe’s hunger. He immediately moved on to the next tragedy, not knowing he’d left behind a single survivor—a young boy who would come to unleash a hell of his own in the name of vengeance. With Altar’s Tournaments as the backdrop, the origins of the Superior Killer are finally revealed!

In the year 2043, Infinite Dendrogram, the world's first successful full-dive VRMMO was released. In addition to its ability to perfectly simulate the five senses, along with its many other amazing features, the game promised to offer players a world full of infinite possibilities. Nearly two years later, soon-to-be college freshman, Reiji Mukudori, is finally able to buy a copy of the game and start playing. With some help from his experienced older brother, Shu, and his partner Embryo, Reiji embarks on an adventure into the world of Infinite Dendrogram. Just what will he discover and encounter in this game world known for its incredible realism and infinite possibilities?

As the clash of the superiors draws to a close, a terror looms over the city of Gideon. Mr. Franklin, the Giga Professor from the Dryfe Imperium, makes his terrifying debut! Both admirably cunning and incorrigibly heinous, the sadistic scientist sets his sights on throwing the city into utter chaos. But as luck would have it, Ray, Marie, and Rook have a front row seat to his psychotic show, and they're not about to go down without a fight! Though outmatched, outnumbered and outsmarted, the knights and Masters of The Kingdom of Altar swiftly move to retaliate. They have the spirit, no doubt, but will it be enough to defeat the mastermind?