Two weeks have passed after Fegelein and Göring's duel in Cairo. Hitler talks with Speer, Fegelein, Traudl, Eva, and Gerda regarding his plans for a ceremony celebrating Göring's most recent defeat when Traudl tells Hitler regarding reports in Egypt. Hitler reassures her that Göring is dead, but Speer tells him that Keitel, who did the investigation on Göring's fate, is incompetent.
Shortly afterwards, an Anglo-American NATO convoy en route to Göring's cave gets destroyed. Both Burgdorf and Koller notify Hitler of this, with the latter telling him that Egypt, Libya, Tunisia, and Chad are under attack by an army of drones. Hitler angrily assures the latter on the phone that he will kill Keitel himself, before suddenly vanishing, experiencing random visions in the process.
Weidling suggests that they carry out another search and rescue mission, but Burgdorf angrily tells him that they're at war again. Meanwhile, in Göring's fortress, Göring shows to Hitler footage of the drone army, which he calls the "Pantheons", effortlessly destroying NATO and the African countries' military forces. He also reveals that he created the Pantheons because the people of Africa have learned how to defeat him, and that he intends to use them to have his revenge by committing continental genocide.
Göring then presents Hitler with two choices: be eaten, or go down fighting with "honor and glory". Hitler chooses the latter and is teleported into outer space, where Göring reveals his alternate form: Machinedramon, much to Hitler's bafflement and horror.
Göring and Hitler engage in a grueling battle, with both men (the former still in his Machinedramon form) unleashing energy beams at each other (at one point, Göring attacks Hitler using rockets). The battle eventually ends when someone else throws a grenade and shoots at Hitler, knocking him unconscious.
Meanwhile, back in the Bunker, Krebs reveals through reconnaissance the existence of several of Göring's fortresses, and speculates that one of them is holding Hitler. Shortly afterwards Mohnke reports that the Pantheons have pushed further into Algeria, Sudan, and Eritrea, and that Libya has been conquered, though Chad, Egypt, and Tunisia are barely holding. Goebbels reveals that Speer has enhanced the bunker even further, upgrading the Super Mega Bunker Mobile into a Conestoga-class Bunker. Weidling proposed that they consult the Dumb Fish to help them, but Goebbels reminds him that the Dumb Fish is no longer with them.
Eventually, the Bunker, in its upgraded form, flies into Sudan, where one of the fortresses is located. Goebbels reveals that the Pantheons have begun deploying chemical and psychological warfare, and that their destination, a NATO-Sudanese outpost that is nearby the fortress, has already been affected. When Weidling and Günsche arrived at the outpost, they find its garrison being driven insane by a red-colored gas and a terrible song that is playing loudly (not to mention backwards and at a lower pitch). The two men witness a machinegun crew shooting at something that is playing the song; eventually the crew consults the help of another soldier simply known as "Roach" to help them. By using his grenade launcher, Roach stops the song. Weidling asks him if he knows the commanding officer; Roach simply answers "yeah", and walks away as the world around them fades to black.
Meanwhile, Hitler, who is imprisoned inside one of Göring's fortresses, tries to figure out a way to let the Bunker know of his presence. Göring watches footage of the destruction of his Sudanese fortress by the Bunker, and activates the Dominion battleship.
Onboard the Bunker, Goebbels congratulates everyone for destroying the Sudanese fortress. However, this celebration quickly turns into a rant when Günsche arrives bringing bad news: that the Pantheons have pushed further into Somalia, Ethiopia, and Uganda, as well as defeating the Egyptian forces in El Alamein and Suez Canal, and that Chad and Tunisia have become devoid of all life. When the room erupts into debates and ramblings, Fritzsche flees the room and approaches Misch, asking him for directions into the Bunker's dropship hangar. Burgdorf stops him from going any further, and tries to shoot him before being stopped by Weidling and Krebs.
Inside Göring's main fortress, Hitler has a nightmare in the form of another bizarre vision. When he wakes up, a Pantheon arrives to his prison cell and gives him food. He rejects it and throws his drinking water at the Pantheon, destroying it. This gives Hitler an idea, and he takes the Pantheon's remains. Meanwhile, Göring speaks to a mysterious man whose identity is hidden by static and a low pitch about the latest situation. The man warns Göring not to underestimate Hitler's subordinates, but Göring assures him that he's merely experiencing minor setbacks. It is then revealed that the man was the one who revived Göring, and that he has formed an alliance to the latter before the events of the series, but threatens to cut off his ties to Göring if he does not behave.
Back in his prison cell, Hitler has built an M1911 pistol equipped with 7 water bullets using the Pantheon's remains; he gets out of his cell and begins running around the fortress. He ambushes a Pantheon and shoots at it, causing it to instantly explode. This alerts Göring and the rest of the Pantheons, forcing Hitler to fight off many Pantheons in the process and wasting much of his ammunition.
Meanwhile, Günsche spots the fortress and reports his findings to Mohnke; there appears to be no defenses around the fortress. Although Mohnke instructs the rest of his team to go there, Stehr disagrees out of concerns that it maybe a trap. He is overruled by the rest of the team, who agrees with Mohnke. Back in the fortress, Hitler begins searching for Göring. When he does get to his personal quarters, Hitler is outraged that Göring has fled. However, he finds a working radio, and contacts Goebbels using codenames about his whereabouts as well as the Pantheons' weakness. Goebbels tells Hitler to rendezvous with Mohnke's team. It's also revealed that the fortress is located inside the former Central African Republic, which Weidling notes has been reduced to a barren wasteland since the events of the first season.
As Hitler tries to meet up with Mohnke's team, he gets too close to a Pantheon, alerting it. Out of panic, he opens fire and the ensuing explosion sends him flying and knocking him unconscious. He was later found by Günsche and Mohnke; the trio evacuates from the fortress, but just before the Bunker can leave, the Dominion arrives and flies into their position.
Göring gives Hitler a chance to surrender, which he immediately rejects. Hitler decides to deploy three of his dropships, equipped with heavy water missiles, to destroy the Dominion. Göring retaliates by deploying RGM 196 drones.
A grueling battle begins on the skies with both sides sustaining heavy casualties. Both the Bunker and the Dominion closes in on each other; once the Dominion is above the Bunker, Hitler launches an EMP missile that disables it, which also has the effect of disabling the RGM-196 drones. After shooting down the remaining drones, the dropships open fire on the Dominion and destroy it. After Hitler makes a premature celebration, the Bunker detects another hostile ship approaching their position, the Hyperion, which is escorted by three Einhänder fighters and one EOS drone.
The fighters effortlessly shoot down the dropships, prompting Hitler to fall back. However, one of the fighters succeeds in shooting down the Bunker, causing it to crash. Just before the Hyperion and the fighters can destroy the Bunker, a missile hits the EOS drone and destroys it. Both Speer and Fegelein contact Hitler by radio, revealing to him that they have contacted the Inglourious Basterds Hitler and his flight of A-10 Thunderbolt planes. When it becomes clear that the battle will be lost, the mysterious man tells Göring to meet him. Inglourious Basterds Hitler, along with his pilots, succeed in destroying the Einhänder fighters and the Hyperion, saving Hitler and all of the Bunker's crew members.
A few hours later, German forces breached Göring's main fortress only to find that it is abandoned and full of offline Pantheons when suddenly they are ambushed by newer variants of the Pantheons. At this point, Göring contacts Hitler by video, introducing him to the mysterious man, who is none other than (and much to Hitler's horror) Reltih Floda, Hitler's alternate universe counterpart.
Reltih Floda reveals to Hitler that he was the one who revived Goring after he died, as well as gave him the powers to turn into a monster and the designs of various weapons from other universes. He also reveals that he intends to take over this universe like he did with several other universes with Hitlers in them. As mentioned later in the episode, 90% of all universes had been erased by him, and the remaining 10% are in danger of meeting the same fate. After swearing that he will kill Reltih Floda, Hitler launches an attack on his base along with Inglourious Basterds Hitler the very next day, but their forces are all taken down and Hitler is brought into Floda's base along with Fegelein.
In the base, Floda teleports Goring and Hitler into a desolate place for them to fight each other to the death while he has Fegelein remain behind to talk with him. With Speer's help, Hitler opens up an artificial black hole up in space and sucks Goring into it, banishing him permanently. Speer then teleports Hitler back to the bunker. However, Floda sees all of this happen and teleports away to someplace else, leaving Inglorious Hitler to destroy his base. Later in the bunker, Mohnke informs Hitler that the enemies have been defeated and Hitler tells him he will engage with Floda in the final battle in 10 hours. Fegelein tells the others that Floda still has remaining armies and how omnicidal and insane he is. Hitler requests to Speer that he give him the ability to transform into a very powerful being so as to be able to defeat Floda and stop his plan of universal annihilation. Fegelein plans to use Speer's prototype teleporter and a dropship carrying an attack team to attack Floda's orbital base, the Zeus Cannon, while also mentioning that him and Hitler alone shall kill Floda.
Hours later, the plan begins. The attack team enters the Zeus Cannon via the dropship whilst at the same time Hitler and Fegelein teleport into the base, but Floda asks Fegelein to leave, for him and Hitler to have equal fighting advantages. When Fegelein refuses, Floda knocks him out, then enters his 'home universe' with Hitler to do battle. In the dimension, both Hitler and Floda turn into their most powerful forms (Jehuty and Anubis, respectively) and start fighting. After a merciless showdown, Hitler successfully defeats Floda while back in the Zeus Cannon, the attack team is shown to have died, and Fegelein self-sacrifices himself by activating the base's self destruct and blowing it up.
Two days later after the incident, everything is back to peace and those who died during the battles (or rather, their remains), even Fegelein, are buried in their graves. The remaining universes are also free from the threat of being erased and destroyed. Meanwhile, Africa is being rebuilt after it was destroyed in the battles, and in the other remaining universes, other Hitlers are planning to form alliances with the 'Hitler who defeated Reltih Floda'. Hitler also receives a call from Nielegef Nnamreh, Fegelein's alternate universe self, and offers to work with him. However, Nielegef Nnamreh refuses the offer, saying he's so traumatized by Floda's antics that he has no intentions to work with any sort of Hitler. Hitler gets pissed off after he hears Nielegef Nnamreh say he would like to meet other Fegeleins to learn from them, and the episode ends with a shot of the whole multiverse.
“After Göring released his ultimate weapon, the Nazis had no choice but to abort their mission to save Hitler and retreat ot the bunker...”
―Opening text
After the opening text, Keitel and Jodl laments the fact that Göring had unleashed his ultimate weapon, which unleashes a new kind of minions. Jodl tells Fegelein to assist them with his antics, but Fegelein tells them that his antics are useless, though Burgdorf is not convinced. Meanwhile, in Cairo, Weidling's forces are being defeated, and he has received the orders to fall back to the bunker.
Three days later, Göring's new minions proceed to unleash their wrath all across Earth: in New York, a City Destroyer destroys a skyscraper with a single shot, incinerating everything in its blast radius. In London, Death Eaters slaughter civilians as well as collapsing a bridge. In Daegu, zombies attack a railyard, with civilians desperately trying to escape the chaos.
In the bunker, both Himmler and Fegelein discuss about how Göring now intends to take over the world while also wiping out Germany (and eating Hitler). Himmler asks Fegelein for assistance; Unfortunately , Fegelein was unable to come up with any ideas.
Meanwhile, in his hideout, Göring remarks that his minions have done well to distract the world as he reveals his ultimate plan: eating the Sun, which will then freeze the Earth and ensure his place as ruler of the world. Two days later, he flies up to the Sun and eats it. In only three days, the Earth is reduced to a frozen wasteland.
Both Himmler and Fegelein discuss again, this time about Project Sunshine: a plan to fire a nuke into Göring's belly, which will then force him to regurgitate the Sun. However, there is one flaw to the plan: the nukes used are so powerful they could blow up half of the Earth if it explodes. Speer arrives to reveal that he has fixed the flaw: by nuking Göring somewhere that is not Earth. Himmler then realizes that Göring must be lured into space first before getting nuked, ending the episode.
End of spoiler