Titans mysteriously appear within the walls with no evidence of how they got in, accompanied by the sentient Beast Titan, an ape-like titan who can speak.
The three-episode series focuses on and her research of the Titans, as well as how the Vertical Maneuvering Equipment was created.
Main article: Setting The plot of Attack on Titan centers on a civilization inside three walls.
Determined to stop the destruction wrought by their childhood friend, Armin, Mikasa, and their surviving comrades reach the Attack Titan and decide to face him head on in an ultimate showdown.