The plot acts as a brilliant, gritty detective noir story set the day before the 57th Exterior Scouting Mission. It follows Annie Leonhart as she takes on a missing person's case in the corrupt Stohess District to distract herself from her impending, terrifying mission to capture Eren. Character designs focus heavily on Annie’s civilian appearance; her signature oversized hoodie and slumped, exhausted posture emphasize her profound burnout and emotional detachment. The visuals swap the series' usual bright battlefield lighting for a dark, rain-slicked, and claustrophobic urban palette, perfectly capturing the underbelly of Wall Sina.