Years ago, when Sora was still a small boy, the Keyblade Master Eraqus was training three pupils in the Land of Departure. After learning of a brewing disaster, Terra, Ventus, and Aqua set off on a journey across the worlds. The trio eventually found the source of the threat, Master Xehanort, and ultimately thwarted his dark ambitions in a great battle. Unfortunately, the cost was high, and all three of them went missing without a trace.

Even worse, this battle was merely the opening act of Xehanort’s grand scheme.

Approximately ten years later, Sora was building a raft with his friends Riku and Kairi on the Destiny Islands, dreaming of worlds beyond their own. One stormy night, darkness fell over the islands, and the fourteen-year-old Sora found himself in Traverse Town, where he would begin his journey to save the World. With a Keyblade in hand and two new friends, Donald and Goofy, at his side, Sora sealed the Keyholes to many worlds to protect them from the darkness. Eventually, he fought and defeated Ansem, the mastermind behind it all.

But the battle didn’t end there for Sora, as he and his friends fought Organization XIII more than once, first in Castle Oblivion and then again a year later. With a little help along the way from the king, Riku, and the other warriors of light, Sora vanquished the Heartless and Nobodies, thus bringing the plans of the Organization to a halt. After finally striking down Xemnas, it appeared that an end to the turmoil was finally at hand.

Peace had returned to the World—until Sora received a letter from the king.

The letter was a summons to Sora and Riku from the great sorcerer Yen Sid, informing them that the World was once again in peril. Master Xehanort had returned, and their previous battles had been little more than steps along the way to his ultimate goal. In order to put a stop to Xehanort’s machinations, Sora and Riku undertook the Mark of Mastery exam in the hopes of becoming Keyblade Masters themselves. The two were sent into the past, visiting the worlds trapped in slumber, where they could learn both the proper way to wield their Keyblades and the power of waking. However, Master Xehanort’s plot had accounted for this, too. Thanks to his newly formed “true” Organization XIII, Sora was plunged into a dark abyss. Riku saved him in the nick of time, but Sora was still stripped of all the strength and abilities he had gained in his adventures.

Master Xehanort’s true goal is now clear: to obtain the χ-Blade at any cost. To stop him, the king and Riku set off in search of Aqua, one of the missing warriors of light. Meanwhile, Sora continues his own journey to recover his lost power and save the World alongside Donald and Goofy, traveling from Olympus all the way to Arendelle.