During the Survey Corps' 49th recon mission, Hange Zoë is determined to capture a titan specimen. Despite not receiving clearance from Commander Erwin Smith, when a titan is spotted in nearby forestland, Hange rides out alone to meet it. Recklessly luring it out, she asks the titan numerous questions and puts her life on the line for the sake of her research. However, the behavior of this particular titan is far from normal. It quickly turns back and enters the wood once again, leading Hange to somewhere specific. What Hange finds is the legacy of former scout Ilse Langnar. In spite of her death, she provides a valuable piece of information that may serve to turn the tide for titan research—a diary documenting her last moments.