Acts

The movie is three hours long, and can be divided into "Acts". Each Act takes up about one hour of the movie.The acts can be sub-divided into "Arcs"
 * Act I: The Avengers kill Thanos after he killed half of all life forms. Before being killed, Thanos reveals that he has destroyed the Infinity Stones. Five years are elapsed and several of the Avengers who were confirmed alive are missing. The Avengers re-assemble and formulate a plan involving time travel to get the Infinity Stones back. They fight some of the remaining villains from Infinity War in Tokyo.
 * Act II: The re-assembled Avengers go back in time with a machine called the Infinity Distorter to get the Infinity Stones. All goes as planned at first, but Hat Kid dies, and a group of the Avengers is captured and brought to Thanos's Sanctuary Ship. Aqua is captured and brought to a room where she is forced to give past-Thanos information about her mission with the Avengers. After confronting several villains and escaping the ship, they allow Himiko Toga disguised as Aqua to infiltrate the Avengers Headquarters.
 * Act III: With several U.A. teachers supervising, Bowser snaps his fingers to bring the 50% of life forms that were killed back into existence. However, Toga (disguised as Aqua) messed with the Infinity Distorter to bring Thanos's ship back to the present. The fully re-united Avengers fight against all of the prieviously encountered villains that survived into Act III, but Thanos, Porky Minch, and All for One are generally considored the ringleaders of the villains. Deku uses all six of the Infinity Stones to snap all of the villains out of existence, which kills him since he cannot handle the power of the Stones. Deku is given a funeral and loose ends are tied up.