Several hundred years ago, humans were nearly exterminated by titans. Titans are typically several stories tall, seem to have no intelligence, devour human beings and, worst of all, seem to do it for the pleasure rather than as a food source. A small percentage of humanity survived by walling themselves in a city protected by extremely high walls, even taller than the biggest of giants. Flash forward to the present and the city has not seen a giant in over 100 years. Teenage boy Eren and his foster sister Mikasa witness something horrific as one of the city walls is damaged by a 60 meter giant causing a breach in the wall. As the smaller giants flood the city, the two kids watch in horror as Eren's mother is eaten alive.Unable to save her , Eren vows that he will wipe out every single giant and take revenge for all of mankind.