107 years ago (743), the natural enemy "Giant" suddenly appeared in the world. Faced with the crisis of survival, the surviving human beings fled to a place and built a triple wall. People have enjoyed 100 years of peace in this isolated environment. Until Eren Yeager was ten years old, a 60-meter-high "super giant" suddenly appeared, which destroyed the city gate with overwhelming force, and then disappeared instantly. The ferocious giant rushed into the wall to prey on human beings.
Allen witnessed people and his mother being swallowed up by giants. With unspeakable hatred and hatred for giants, he vowed to kill all the giants. Two years after the fall of the Berlin Wall, Allen joined the 104 training corps to learn the skills of fighting giants. During the three years of training the corps, Allen has a strong spirit that others can't match in the training soldiers of the same period. Although Allen has seen hell with his own eyes, he bravely challenged the giant and got his wish, joining the long-awaited investigation team.
To put it simply, it is the story of how a teenager who can become a giant kills the giant, revenges his mother and finds out why he can become a giant. )