Attack on Titan
The plot of Attack on Titan is based around a civilisation inside three walls, the last location where humans still live. Over one hundred years ago, humanity was driven to the brink of extinction after the emergence of humanoid giants called Titans, who attack and eat humans on sight.
Witnessing the fullness of the Titan horror first-hand, a young and tenacious boy called Eren Jaeger vows to rid the world of all Titans and win back freedom for mankind. He is joined by his adoptive sister, Mikasa Ackerman and their friend, Armin Arlert as they set out to fulfil this shared dream.