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-looking 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 ―第57回壁外調査①― Megata no Kyojin -Dai Gojū-Nana Kai Hekigai Chōsa (1)-?)
|August 4, 2013|
| Erwin's long distance enemy scouting formation proceeds towards Shiganshina as expected until Armin encounters a Female Titan. Joining Reiner and Jean, the three confront the Titan to buy the commander time.
Reiner comes close to death in the Female's grip, but narrowly escapes with his life. Afterward, the Female Titan changes direction, heading for Eren's position in the formation.
|18||Forest of Giant Trees: The 57th Exterior Scouting Mission, Part 2
(巨大樹の森 ―第57回壁外調査②― Kyodaiju no Mori -Dai Gojū-Nana Kai Hekigai Chōsa (2)-?)
|August 11, 2013|
|The Female Titan devastates the Scout Regiment in search for Eren, killing any soldier it comes across. Meanwhile, Commander Erwin redirects the formation into the Forest of Giant Trees.|
|19||Bite: The 57th Exterior Scouting Mission, Part 3
(噛み付く ―第57回壁外調査③― Kamitsuku -Dai Gojū-Nana Kai Hekigai Chōsa (3)-?)
|August 18, 2013|
| While Squad Levi flees the Female Titan in the forest, Eren thinks back to the days when Hange experimented with his Titan abilities and his squad's trust in him was tested. Placing his faith in his comrades, he agrees to follow Captain Levi's orders to advance without confronting the Titan.
The chase comes to an abrupt halt when the Female Titan runs right into Commander Erwin's trap, where it is caught with weaponized restraints. As the squad recovers, Levi joins the commander to discover the identity of the Female Titan.
|20||Erwin Smith: The 57th Exterior Scouting Mission, Part 4
(エルヴィン・スミス ―第57回壁外調査④― Eruvin Sumisu -Dai Gojū-Nana Kai Hekigai Chōsa (4)?)
|August 25, 2013|
|The Scouts worry over the thought of Titan spies in their midst as Commander Erwin makes attempts to extract the Female Titan's human form. However, the Female Titan uses a scream to attract nearby Titans which devour its body.|
|21||Crushing Blow: The 57th Exterior Scouting Mission, Part 5
(鉄槌 ―第57回壁外調査⑤― Tettsui -Dai Gojū-Nana Kai Hekigai Chōsa (5)-?)
|September 1, 2013|
| Trusting in the abilities of his comrades, Eren retreats as Squad Levi attacks a newly transformed Female Titan. However, its abilities catch the Scouts off-guard before all are killed one by one. In a rage, Eren transforms into his Titan form to battle the monster himself.
Eren relentlessly assaults the Female Titan, but eventually he is defeated as Mikasa comes to his aid. Biting Eren out of his Titan's nape, the Female Titan retreats while Mikasa pursues it. Levi arrives afterward, joining Mikasa to pursue the Titan from a distance.
|22||The Defeated: The 57th Exterior Scouting Mission, Part 6
(敗者達 ―第57回壁外調査⑥― Haisha-tachi -Dai Gojū-Nana Kai Hekigai Chōsa (6)-?)
|September 8, 2013|
| Mikasa and Captain Levi pursue the Female Titan, deciding to rescue Eren and join in the retreat. Levi quickly overpowers the Female and rescues Eren, though he is injured in the process.
The retreating Scouts are pursued by Titans, leading them to reluctantly toss the corpses of their dead from the carriages. Returning to Calaneth in bitter defeat, the Scouts are later ordered to transport Eren to the capital.