Complete story — includes the ending
Chapter 1 – The Rumbling: The Rumbling continues, with the Colossal Titans killing countless people -- Ramzi, Halil, and Grisha's parents among them -- and destroying civilizations all over the world. Meanwhile, the ship carrying the scouts and warriors arrive at Odiha. Thinking her father is already dead, Annie decides to stay behind on the ship with Gabi, Falco, Yelena, and the Azumabito, while the remaining Warriors, Scouts, and Onyankopon take the flying boat to stop Eren. The next day, just as the group are about to take off, Floch, having survived the battle at the port, damages the fuel tank of the flying boat before being killed by Mikasa. However, before the flying boat can be properly repaired, the Rumbling arrives. Hange appoints Armin as the next commander of the Survey Corps before going up against the Colossal Titans alone, buying the others just enough time to get the aircraft off the ground. Hange is eventually killed by the body heat of the Wall Titans and is welcomed to the afterlife by Erwin, Moblit, and the other deceased Scouts. They assure Hange that her duty as commander has been fulfilled. Chapter 2 – Sinners: En route to Eren, the scouts and warriors discuss plans to confront him, with Armin still believing in a peaceful resolution. During their conversation, Eren suddenly brings them into the Paths dimension, explaining that in order to stop the Rumbling, they must kill him. He further elaborates that he will not take away their freedom to do so, just as he has the freedom to keep moving forward with it. Back on the ship, Falco reveals to Annie that he dreamt his Titan might have the ability to fly. Many refugees from Liberio, including the Warriors' families, escape to Fort Salta, a Marleyan military base. As they arrive, they see a number of airships launching an assault on Eren and the Wall Titans. However, the airships are quickly destroyed by the Beast Titan, which had materialized on Eren's skeletal form, leaving everyone utterly hopeless. Just then, the flying boat arrives and the Scouts and Warriors jump from the aircraft. Pieck and Reiner transform, with the latter managing to pin the Beast Titan down. Armin calls out to Eren, asking what about him is truly free.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Attack on Titan season 4. Reference markers and HTML formatting removed. · Content license