The story revolves around the origin of the Titans, which dates back 100 years ago when scientists at the Wuhan Institute of Science and Technology experimented on humans to create giants as military weapons. However, the experiment went out of control, resulting in a virus that spread and caused a global apocalypse, killing 90% of the world's population.
The story follows the main character, Alan, who is a purebred Titan with enhanced fighting power. He is part of a rebellion group led by Captain Tokuda, who is also a Titan, with the goal of overthrowing the ruling Aristocrats and bringing down the walls that confine the remaining humans.
The rebellion group faces numerous challenges, including fighting against the military and other Titans. Along the way, Alan discovers the truth about his past and the reason behind the apocalypse. He also meets new allies, including Mikasa, who becomes his love interest.
The story culminates in a final battle between the rebellion group and the military, led by General Uber, who is revealed to be the mastermind behind the apocalypse. Alan and his allies fight bravely, but not without sacrifices. In the end, they are able to defeat the General and destroy the walls, allowing humans to finally escape their confinement.
The story concludes with Alan and Mikasa standing on the city wall, looking out at the vast world outside, symbolizing a new beginning for humanity.
Here are the key facts extracted from the text:
1. 100 years ago, scientists in Wuhan experimented on giants created by humans to serve as military weapons.
2. The experiments went out of control, and a virus escaped from the laboratory, spreading and causing mutations.
3. The virus infected normal people, who then mutated and began killing others, causing a great disaster that killed nine-tenths of the world's population.
4. The last survivors were forced to live within three walls to protect themselves from the mutated humans.
5. The walls were guarded by the military, who controlled the flow of people and resources within the walls.
6. The nobles enjoyed happiness and privileges within the third circle, while commoners were treated as slaves and forced to live in the outer circles.
7. A group of rebels, led by Captain Tokuda, planned to overthrow the aristocratic regime and bring freedom to the people.
8. The rebels had discovered that the key to destroying the regime lay in a person named Alan, who possessed a special power.
9. Alan's parents were scientists who worked on the project that created the giants and were killed by the military.
10. Alan was injected with a serum that registered his name, but the injection was interrupted by the military, and his parents were taken away.
11. Alan joined the rebels and discovered that Captain Tokuda was the one who killed his parents.
12. The rebels planned to use explosives to destroy the second castle and take over the city, but their plan was discovered by the military.
13. A giant Titan appeared and attacked the rebels, but Alan was able to transform into a giant skeleton cell and defeat the Titan.
14. The rebels then carried out their plan to destroy the second castle, but they were met with resistance from the military.
15. Alan and his friend Mikasa fought bravely, but they were outnumbered and outgunned.
16. Just as all hope seemed lost, a giant Titan appeared and attacked the military, giving the rebels an opportunity to escape.
17. The Titan was revealed to be a test model, and Alan was able to communicate with it.
18. The rebels then used the Titan to carry a bomb to the citadel, but the plan was foiled when the timer was destroyed.
19. Mikasa risked his life to repair the timer, but it was too late, and the bomb did not explode.
20. The general, who was revealed to be the one who killed Alan's parents, was not dead and attacked Alan and his friends.
21. Tokuda turned into Peter and picked up the bomb, rushing up to the vital area and firing the bomb.
22. The bomb exploded, causing rocks and soil to fall, and Alan fell to the ground.
23. Mikasa appeared and grabbed Alan's hand, and they stood on top of the city wall, fulfilling Alan's promise to take her to the top.