Attack on Titan is a dark fantasy story about humans fighting giant monsters called Titans.
The story follows Eren Yeager, a boy who lives inside huge walls that protect people from Titans. After a Titan destroys his home and kills his mother, Eren promises to destroy all Titans.
He joins the military with his friends Mikasa Ackerman and Armin Arlert. As they fight, they discover shocking secrets about the Titans, the world outside the walls, and themselves.