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?

In a world of infinite possibilities, how would you choose to live?

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?

As conflict rages at the peace conference between Altar and Dryfe, another battle entirely breaks out on the city streets. Ideologies intersect as those seeking the truth clash with each other, while a treasure-seeker makes her own desperate play. A grand battle, one that may well begin to unravel the mysteries weaved into the world, is about to unfold... What exactly are the Control AIs? What is the nature of the Arch Sage? And, perhaps most urgent of all... How might the people within Infinite Dendrogram avoid the ultimate Game Over?

"First published in Japan in 2018 by Hobby Japan, Tokyo."--Colophon.

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.

After an unexpectedly challenging journey, Ray and his party finally arrive at Gideon, The City of Duels. The mere sight of the towering arenas and thriving fantasy townscapes is enough to instantly awe and enchant him. However -- like anything that stands tall and proud -- the city cast a great, dark shadow. The name of this shadow is the Gouz-Maise gang -- a loathsome band of cutthroats who turn their profit kidnapping children and demanding ransom. Ray, wide-eyed and innocent, was blissfully unaware of just how cruel the hyper-realistic world of Infinite Dendrogram would become.

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?

The city of duels is suddenly besieged by one of the Dryfe Imperium's Superiors. Mr. Franklin, the Giga Professor. Both admirably cunning and incorrigibly heinous, the sadistic scientist sets his sights on throwing Gideon into utter Pandemonium. As luck would have it, Ray, Marie, and Rook are caught right in the middle of his malicious machinations. Though outmatched, outnumbered and outsmarted, the knights and Masters of The Kingdom of Altar don't hesitate to retaliate. They have the spirit, no doubt, but will it be enough to defeat the mastermind of Franklin's Game?

As Death Period is settling into their new home in Gideon, City of Duels, the Tournaments are about to begin. Many powerful Masters, Ray Starling included, have gathered from all over to fight for the right to challenge a special UBM—but in a strange twist of fate, Ray finds himself matched against an opponent that even Altar’s Superiors would hesitate to fight. Meanwhile, Sechs and his Illegal Frontier finally commence their plan to break out of the gaol, setting off a cascade of consequences that will echo throughout the world of Infinite Dendrogram. Will Ray emerge victorious from his unexpected challenge? Will Sechs succeed in his plot to do the unthinkable? Or will the answers to these questions be swallowed up by another storm brewing on the horizon, as this escalating chain of events threatens to stir the Overlord of Dreams from a restless slumber?