Attack on Titan 2

2000 years from now, the human race is nearly exterminated by mindless, man-eating giants known as Titans. In a last ditch attempt to live, a small percentage of humanity survived by walling themselves in a city protected by extremely high walls, even taller than the biggest of Titans. Flash forward to the present and the city has not seen a titan in over 100 years having a century of uneasy peace. But the walls of the city cannot hold forever.