|Listen to me, Eren. There's something I want to say. Thank you for being with me. Thank you for teaching me how to live. Thank you...for wrapping this scarf around me....|
|— Mikasa shows her gratitude for everything Eren has done|
While recalling the past with their mother, Eren and Mikasa face the Titan that devoured her five years ago. However, Hannes appears to defend the two, happy to get a chance to avenge Carla. The others attempt to help, but Reiner continues throwing Titans at the soldiers while Ymir is unsure on which side to take. Meanwhile, Erwin finds himself on his knees, with the soldiers around him dying as the Armored Titan finally reaches them.
At the same time, Eren and Mikasa witness Hannes being devoured by his foe. Eren despairs, still finding himself to be useless as in his mother's case, but Mikasa claims otherwise, thanking him for teaching her how to live and giving her the red scarf. Eren gets up in order to defend her with his bare fists, and with Eren's fiery rage, a sudden power causes all of the other Titans to charge at the Titan, devouring it. This worries Reiner and his companions, and Eren warns them not to come close, causing the Titans to attack the Armored Titan. The soldiers begin their retreat, but Ymir decides to help Reiner and Bertolt, much to everyone's surprise. As they return to the Walls, Eren, Mikasa, and Armin recall their time with Hannes. Elsewhere in Shiganshina District, Bertolt asks Ymir why she bothered to side with them, to which she says that she owed them and did not want them to return home empty-handed. Bertolt thanks her as she reaches out to the moon, saying that being a goddess is not so bad.
As the Titan from five years ago approaches Eren and Mikasa, he remembers the time when his mother was yelling at him because he always got himself into trouble and Mikasa always had to save him. Eren then remembers when the Titan cruelly devoured his mother. Mikasa tries to protect Eren as the Titan attempts to reach them. They suddenly realize that Hannes has come to the rescue, and he is eager to fight the Titan. Mikasa wants to help Hannes defeating the Titan but then Eren says that she can not fight with her injuries and asks her to untie his hands.
Meanwhile, Armin and Jean are heading to help them, but are suddenly stopped by the Titans being thrown at them by the Armored Titan. Ymir is hesitating to cooperate with the Survey Corps while saving Erwin from the attacking Titans, seeing that Reiner's power is far beyond humanity's. Seeing Ymir confused, Historia jumps to Ymir's head. Historia then asks Ymir about her reason she gave of wanting to save herself, she then asks again if she is being protected again by her. Historia asks Ymir to stop living for other people's sake and start to live for the sake of themselves. As Erwin is laying on the ground, they realize that the Armored Titan has again started charging towards them, and throwing another Titan, he knocks Jean off his horse. At the same time, Hannes is overcome by the Titan and is bitten in half, killing him.
Eren and Mikasa witness in horror how Hannes is being devoured by the Titan, which causes them both to break down, Eren cries and laughs out of frustration seeing that he is being useless, but Mikasa thanks him for teaching her how to live and for giving her his scarf. Eren realizes his hands have completely healed and stands up, telling Mikasa that for her, he would wrap her in a scarf again and again, forever. With a ferocious scream, he tries to fight the Titan with his bare fists, causing the Titan to stop its movement. The moment his fist strikes the Titan's hand, Eren awakens a newfound power, causing the nearby Titans come to rescue him and attack the Titan, devouring it. This allows Eren to escape while carrying Mikasa on his back.
As Reiner sees that Eren indeed has the "Coordinate," he tries to go after him to catch him once again, thinking that the worst possible person to have the Coordinate is Eren, but Eren yells at him not to come close or he will kill him, which orders all Titans to attack Reiner on the spot. As the Armored Titan is surrounded, Erwin orders everyone to seize the opportunity and escape. Ymir suddenly stops and bids Historia farewell, before rejoining with Reiner and Bertolt. As they return to the safety of the Walls, Eren, Mikasa, and Armin remember times of their childhood they spent with Hannes.
Later that night, Reiner, Bertolt, and Ymir rest atop Wall Maria in the ruins of Shiganshina District, in shock and trying to catch their breaths. A completely exhausted Ymir lies face up and is questioned by Reiner about her reasons for coming with them. Ymir responds that it is because she is stupid, and volunteers to be something for them to hand over, since she is aware that they can not return to their hometown empty-handed. Reiner warns her that if she returns with them there will be no hope for her, and advises her to run now or never. However, Ymir dismisses his warning and tells him that she is too tired to run.
Bertolt then asks her why she saved his life, and Ymir tells him she did it because she heard him screaming; and also because she wanted to return the favor, because if they had not come to breach the Wall, she would be still trapped in her "endless nightmare." She states that the only one who understands them is her, and the same can be said for her, because if she were alone, she would be helpless. A touched Bertolt thanks her and apologizes for having misjudged her before, but Ymir tells him that it is okay. She reaches her hand out to the moon above, concluding that being a goddess is not such a bad feeling.