One hundred and seven years ago, the Titans nearly drove humanity to extinction. These giants, typically standing about ten meters tall, feed on human beings. The survivors of this slaughter built a fortified city protected by walls 50 meters high to shield themselves from the threat.

For a century, humanity lived in peace. Eren is a young boy who dreams of leaving the city to explore the outside world. He leads a peaceful life with his parents and his sister, Mikasa, in the Shiganshina District.

However, in the year 845, a Titan over 60 meters tall suddenly appears. He kicks a hole through the wall of the Shiganshina District, triggering a horrific invasion. Eren is forced to watch, paralyzed, as his mother is devoured before his eyes. Following these traumatic events, he vows to join the city’s military forces with one singular goal: to exterminate every last Titan in existence.

A chilling mystery remains: Since the walls are 50 meters high and have protected humanity for a century, where did a 60-meter giant come from, and why did it wait 100 years to appear?