Part 2
Years before, a young Eren is forcibly injected with an experimental serum by his father, but soon after Eren's mother discovers this, a military police squad break in, taking Eren's parents and burning the place. Eren survives with the help of Souda. In the present, Eren is captured by Kubal and his squadron, believing he is a threat to humanity. Mikasa does nothing to defend him. Armin and Souda try to persuade Kubal to spare Eren's life, but Souda is killed. Before Eren is executed, a Titan busts in, killing Kubal and his squadron, takes Eren, but spares Mikasa and her comrades.
Eren awakens in a mysterious bunker with Shikishima, who reveals the origins of the Titans as a military experiment gone wrong that soon developed into a virus that turned people into Titans and decimated humanity. Shikishima plans to launch a coup against the corrupted government who has been oppressing its people with the walls and with fear of the Titans. Eren learns that Shikishima has stockpiled some of the pre-Titan War weapons, and agrees to help.
Hange, Mikasa and the others retrieve an undetonated bomb in Eren's hometown with the hopes of using it to seal the outer wall. They encounter Shikishima's troops and reunite with Eren. However, Shikishima attempts to recruit them into his coup, revealing that he plans to use the dud bomb not to seal the wall but to blow up the capital and let the Titans overtake everything, freeing humanity. Realizing that more innocent lives would be shed, Eren stands against Shikishima. As they fight, Sannagi sacrifices himself to bring down a nearby tower that falls on the weapon stockpile, blowing it up while the others escape with the bomb. However, Shikishima reappears on the truck and stabs himself revealing himself to be the Titan that took Eren earlier. The gang attack Shikishima, who smashes Eren into a wall, but Eren transforms into his Titan form and defeats Shikishima. Titan Eren climbs the wall and plants the bomb, reverting to his human form while Armin sets the fuse.
Having survived the earlier attack, Kubal wants the group to give up Eren and return to the interior, but they refuse. Kubal shoots Armin, but is shot by Sasha and falls, transforming into the Colossal Titan which actually breached the outer wall in part 1. Mikasa and Jean try to jump on the Colossal Titan's back. The bomb does not go off, so Mikasa tries to get the bomb fuse working again, but is confronted by Shikishima. Eren tries to break into the Colossal Titan's nape but is knocked down. Shikishima sacrifices himself by transforming into a Titan and lodging the bomb into the Colossal Titan's mouth. The detonation successfully closes the hole in the wall and Eren and Mikasa stand at the top of the wall overlooking the ocean.
In a post-credits scene, footage of the battle with the Colossal Titan is analyzed, in Shikishima's bunker, by an off-screen character, who says that Eren and Mikasa's unpredictability is what makes them "fascinating".
