More than a century ago, humans lived in peace. But one day, humanity was almost entirely decimated by gigantic beings, the Titans. No one knows where they come from! One thing is certain: they seem driven by a single purpose: to devour humans, one by one!
Since then, the last survivors built a stronghold, a city surrounded by high walls within which their descendants live today. Ignorant of the outside world, they believe themselves to be safe from the Titans! But their lives take a turn the day a monstrous Titan appears...