Several hundred years ago, humans were exterminated by Titans. Titans are several stories tall, seem to do it instead of as a food supply, seem to have no intellect, devour people and, worst of all. A tiny percentage of humanity survived by walling themselves at a city protected by excessively significant walls, much taller than the greatest Titans. Flash have not seen a Titan in over 100 years. As the city walls are destroyed Teen boy Eren and his foster sister Mikasa watch something horrible. Whilst the Titans flood the city, the two kiddies watch in terror as their mother is eaten living. Eren guarantees that he will kill every single Titan and take revenge for most mankind.