The Scout Regiment has set out from Calaneth District, heading for Shiganshina while evading what Titans they encounter. However, havoc falls upon Erwin Smith's formation when a Female Titan attacks the right flank, seemingly hell-bent on finding Eren Jaeger and taking him alive.
|17|| Female Titan: The 57th Exterior Scouting Mission, Part 1|
(女型の巨人 Megata no Kyojin?)
|August 3, 2013|
|With the start of the expedition, the scouts encounter Titans as they head out, having them dealt with by the support squad while they enter Erwin's formation meant for avoiding the Titans. Sasha and Armin experience it first hand, with the latter one even witnessing an abnormal. However, as things progress, a mysterious Female Titan appears at Armin's location, being neither a regular Titan nor an abnormal - it is a human using a Titan's body. Armin witnesses its strength and intelligence as the Female Titan kills Ness and Cis. Thinking that the same fate awaits him, Armin is then approached by the Titan. However, the Female Titan just looks at his face and walks away. Not having enough time to be shocked, Reiner and Jean reach Armin's location, with the latter telling them that the Female Titan has brought an army of Titans, wiping out the right side of the formation. They engage in fight with the Titan in order to stall it, however, they are unable to do much and Reiner almost falls victim to the Titan, but in the end manages to get through. The mysterious Titan then leaves, just to head to Eren's location.|
|18|| Forest of Giant Trees: The 57th Exterior Scouting Mission, Part 2|
(巨大樹の森 Kyodai-ju no Mori?)
|August 10, 2013|
|After their encounter with the Female Titan, Reiner tends to Armin's wounds while Jean calls for his horse. With the situation looking bleak as they have to decide who will be left behind, Christa appears with two horses, saving everyone. Meanwhile, the Female Titan keeps running towards Eren's location, killing anyone who gets in its way. Much to the surprise of the soldiers, the formation heads into a Forest of Giant Trees. Erwin orders that only middle section is to enter the forest while all other soldiers go around, eventually stationing themselves near the trees. They are ordered to kill any Titan that attempts to enter the forest. The lower ranking soldiers wonder about this decision, but knowing that Erwin must have a reason for it, they decide to obey their orders. The Female Titan then enters the forest, chasing Eren, while the rest of the squad ask Levi for orders, proposing to engage in a fight with the pursuer.|
|19|| Bite: The 57th Exterior Scouting Mission, Part 3|
|August 17, 2013|
|Levi fires a noise round and tells the squad to continue moving forward. With more of the rearguard getting killed by the Female Titan, Eren begs his squad to let him fight but they tell him to trust Levi's decision. As he considers changing into his Titan form, Levi tells him to choose to be either a monster or a member of the Scout Regiment. Eren starts remembering when Hange, Levi and his squad had him try to transform into a Titan for experimental purposes but was unable to. During a break when he tried to pick a teaspoon, Eren suddenly partially transformed, much to the squad's shock. They almost attacked him but Levi ordered them to stand down. Hange deduced that Eren is able to transform into a Titan not by solely injuring himself but also due to his desire to fulfill his goals. The squad apologized to Eren and told him they should trust each other. Remembering this, Eren decides to trust his squad's plan. It is then revealed that Levi's squad is bait to lure the Female Titan into an ambush where Erwin and his men fire hundreds of grappling hooks at the Female Titan, trapping it. Levi leaves his squad to meet up with Erwin to find out who the Female Titan is.|
|20|| Erwin Smith: The 57th Exterior Scouting Mission, Part 4|
(エルヴィン・スミス Eruvin Sumisu?)
|August 24, 2013|
|With the Female Titan restrained, Erwin Smith and Levi try to figure out its identity with no success as it is able to harden its skin to prevent them from cutting out the human inside. Jean, Armin and the rest of Levi's squad realize it was Erwin's plan to use Eren as bait to draw out the mole within the Scout Regiment who joined them after the Walls fell and only told his real plan to those who were part of the Legion before the fall. Meanwhile, the others wonder about what is happening inside the forest until the Female Titan gives a loud scream that draws all Titans in the vicinity to her. Despite the Scout Regiment's attempt to stop them, the Titans ignore the humans and eat the Female Titan's body in a frenzy, which makes Erwin call off the expedition. However, knowing that there is no confirmation that the mole has also been eaten by the Titans, Erwin orders Levi to resupply while the mole, disguised as a cloaked Scout Regiment member, attacks Levi's Squad, killing Gunther Schultz.|
|21|| Crushing Blow: The 57th Exterior Scouting Mission, Part 5|
|August 31, 2013|
| Erwin continues with his theory, believing to know how the Female Titan escaped. Armin deduces that the reason for which the attack of Titans was stopped midway was Eren's transformation into a Titan. Meanwhile, Erwin's hypothesis is proven to be correct as the culprit transforms into the Female Titan once again. After much debating, Eren decides to leave defeating it to the rest of the Special Operations Squad while he heads for the HQ. Despite the Levi Squad initially having an upper hand, Eren watches in horror as his comrades are killed one by one. His rage causes him to make the decision to transform into a Titan to join the fight.
They engage in battle and even though Eren believes to have made a wrong choice, he blames the Female Titan for his squad's death and promises to kill it. The fight resumes and the Female Titan manages to dodge most of his attacks. Later on in the battle, Eren starts to twitch in a disturbing matter. Suddenly, Eren notices something about his opponent, but at that moment, his head gets crushed and his real body devoured by the Female Titan just as Mikasa arrives. In an attempt to save Eren, Mikasa keeps attacking the foe, but to no avail. In the end, Levi appears, grabbing Mikasa. Together, they follow the Female Titan.
|22|| The Defeated: The 57th Exterior Scouting Mission, Part 6|
|September 7, 2013|
| In a desperate attempt to save Eren, Levi and Mikasa team up against the Female Titan. With Mikasa being the bait, Levi shows off his speed and power, cutting up the Female Titan, giving it no time to defend itself. Seeing this, Mikasa takes the chance to kill the foe, but the Female Titan sees through it and Levi has to defend her, injuring himself in the process. Slicing through the Female Titan's mouth, they manage to take Eren and get away, with the Female Titan shedding tears over its failure.
Later, on their way home, the soldiers argue with Erwin over his decision to leave behind a corpse of their friend, Ivan. In the town, the families and friends of the Special Operations Squad soldiers are awaiting them, not knowing the truth about their fate. Meanwhile, Dieter does not follow Erwin's order and ends up having the Titans follow them, forcing them to get rid of the rest of the corpses, including some members of Levi's own squad. Finally arriving to the town, the soldiers have to face the results of their failure, with Eren being handed over to the authorities.