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.

The curtain may have fallen on the King of Orchestras, but Franklin’s game is only just warming up. In order to save the City of Duels, Ray and his companions will now have to face an old ally—the Magingear pilot Hugo Lesseps—and unravel the enigma of his Embryo’s icy powers. And that’s not nearly the last trick the Giga Professor has up his sleeve... When sinister schemes clash with unwavering conviction, who will emerge victorious?

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

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.

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?

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.

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?