2047. Vingt neuf ans ont passé depuis l'affrontement nucléaire entre les Terriens et les nazis de la lune. Neomenia, l’ancienne base lunaire des nazis, est devenue le dernier refuge de l’Humanité, car la Terre a été dévastée par le conflit. Cependant, ses entrailles cachent une puissance qui pourrait sauver les derniers humains … ou les détruire définitivement. Face à la menace, quelques réfugiés de la Lune vont se rendre au centre de la Terre. Ils y affronteront une race reptilienne extraterrestre.
En Allemagne durant la Seconde Guerre mondiale, Jojo « Rabbit » Betzler, âgé de 10 ans, est maltraité par ses camarades. Il se console avec son ami imaginaire, Adolf Hitler. Amoureux de la « nation », il voit sa vie remise en cause lorsqu'il découvre que sa mère, Rosie, cache une jeune fille juive, Elsa Korr.
Pendant les années 80, un vieil homme, Calvin Barr (Sam Elliott), vit ses derniers jours dans sa ville natale, avec son chien. Barr se souvient de son passé pendant la Seconde Guerre mondiale, alors qu'il servait en tant que soldat des forces spéciales pendant une mission pour assassiner Adolf Hitler; il réussit sa mission, mais l'opération fut classée secrète et ne fut jamais révélée au grand public. Barr continue ses activités quotidiennes, en particulier rendre visite au salon de coiffure de son frère Ed (Larry Miller), quand il tient tête à un gang de voyous qui essaye de voler sa voiture et est suivi par de mystérieux hommes dans une voiture du gouvernement.
Sometime in the early 1980s, Miami-Dade Police Department detective Kung Fury and his partner Dragon apprehend a red ninja in a back alley, but Dragon is sliced in half by the ninja while Kung Fury is suddenly struck by lightning and bitten by a cobra, giving him extraordinary kung fu powers that enable him to defeat his foe. Years later in 1985, after defeating a rogue arcade machine robot, Kung Fury quits the force when he is assigned to partner with Triceracop, fearing that he would lose another partner in the line of duty. Meanwhile, Adolf Hitler, a.k.a. "Kung Führer", enters the timeline and remotely guns down the police chief and attacks the precinct through a mobile phone. Intent to avenge the chief, Kung Fury has computer whiz Hackerman send him back in time to kill Hitler in Nazi Germany. A glitch in the system, however, sends him back into the Viking Age. After Kung Fury meets the Viking valkyries Barbarianna and Katana, the Norse god Thor sends him to Nazi Germany for him to finish his job.
A group of researchers in Antarctica are abducted by a platoon of gas-masked soldiers wearing swastika arm bands and dragged into a hidden environment in the center of the Earth. There, they discover that Dr. Josef Mengele and a group of surviving Nazi soldiers are plotting an invasion of Earth to create a Fourth Reich.
In 1941, SS colonel Hans Landa, the "Jew Hunter", interrogates French dairy farmer Perrier LaPadite as to the whereabouts of the last unaccounted-for Jewish family in the neighborhood. Under threat of continued harassment from the Germans, LaPadite reveals that the Dreyfus family is hidden under the floor. Landa orders SS soldiers to shoot through the floorboards and kill the family. All are killed except Shosanna, who escapes and flees through the field. Landa watches her go, deciding not to shoot her at the last second.
During World War II, Wehrmacht Colonel Claus von Stauffenberg (Cruise) is severely wounded during an RAF air raid in Tunisia, losing his right hand, the ring and pinkie finger on his left hand, and his left eye, and is evacuated home to Nazi Germany. Meanwhile, Major General Henning von Tresckow (Branagh) attempts to assassinate Adolf Hitler by smuggling a bomb aboard the Führer's personal airplane. The bomb, however, is a dud and fails to detonate, and Tresckow flies to Berlin in order to safely retrieve it. After learning that the Gestapo has arrested Major General Hans Oster, he orders General Olbricht (Nighy) to find a replacement. After recruiting Stauffenberg into the German Resistance, Olbricht presents Stauffenberg at a meeting of the secret committee which has coordinated previous attempts on Hitler's life. The members include General Ludwig Beck (Stamp), Dr. Carl Goerdeler (McNally), and Erwin von Witzleben (Schofield). Stauffenberg is stunned to learn that no plans exist on the subject of what is to be done after Hitler's assassination.
En décembre 1944 à Berlin, Joseph Goebbels, le ministre de la Propagande, veut qu'Adolf Hitler fasse un grand discours pour galvaniser les masses. Mais celui-ci est dépressif et un seul homme est capable de relever le défi : l'ancien professeur de théâtre d'Hitler, un juif extrait d'un camp de concentration, qui se prénomme lui aussi Adolf. Il a cinq jours pour le préparer à cette harangue.
Downfall begins with footage of the real Traudl Junge expressing guilt and shame for admiring Hitler in her youth. The film continues showing Hitler (Bruno Ganz) hiring Junge (Alexandra Maria Lara) as his secretary at the Wolf's Lair in East Prussia in November 1942.
The opening of the film shows us a montage of Adolf Hitler's life from the years 1899-1907. The 10-year old Hitler (Thomas Sangster) is shown to be arrogant and disobedient. He has a stern, ill-tempered father, Alois Hitler (Ian Hogg), and a doting mother, Klara Hitler (Stockard Channing), who indulges his dreams of becoming a great artist. One day, his father dies of a heart attack but the young Hitler shows no empathy or concern. Seven years later, a 17-year old Hitler (Simon Sullivan) applies unsuccessfully to the Vienna Arts Academy but is told he lacks the talent to become an artist. Following his mother’s death, he moves to Vienna permanently but is unable to find work and soon becomes destitute and homeless. Influenced by the city’s prevalent anti-semitism, young Hitler becomes convinced that the Jews and immigrants are to blame for his misfortunes.
The year is 1918, and Max Rothman (John Cusack), a fictional Munich art dealer, is a veteran of the Third Battle of Ypres, where he lost his right arm during the latter stages of World War I, effectively ending his career as a painter. He returns to Germany and opens a modern art gallery. He is married to Nina (Molly Parker), but also has a mistress, Liselore von Peltz (Leelee Sobieski). Through a chance encounter, Rothman is approached by a young Adolf Hitler (Noah Taylor), a war veteran as well, disgruntled over Germany's loss during the conflict and the country's humiliation by the signing of the Versailles Treaty; Hitler wishes to have his artwork drawings displayed.
During the spring of 1942, a few months before the notorious Battle of Stalingrad, Adolf Hitler (Leonid Mozgovoy) retires to his secluded Berghof Retreat nestled on a remote hilltop, within Berchtesgaden in Bavaria to unite with his long-time female companion Eva Braun (Yelena Rufanova). At the residence, Braun spends her spare time with trivial pursuits such as whimsically dancing in the nude, humming to military style marching band music, and rummaging through Hitler's personal belongings. Later, Braun is thrilled to learn that her beloved "Adi", as she affectionately calls him, will be joining her for a visit. Hitler is accompanied by guests Joseph Goebbels (Leonid Sokol), Magda Goebbels (Yelena Spiridonova), Martin Bormann (Vladimir Bogdanov) and a priest (Anatoli Shvedersky) for conversation and playful banter.
In 1916, during the thick of World War I, a German and a French fighter ace by the names of Gunther von Beckman (Hoffman) and Jo Cavalier (Belmondo) manage to drag each other out of the sky. An argument and subsequent fistfight about who is to be whose prisoner is rudely interrupted by an artillery barrage, forcing both to stick together in order to survive. In a humorous side scene, corporal Adolf Hitler (Meisner) is berated by his frustrated First Lieutenant Rosenblum for his clumsiness.