Your name is Eren Yeager, a young "survey cop" dedicated to the eradication of large humanoid man eating monsters known as "titans" who have killed your parents, terrorized your community, and have taken away your freedom by forcing your people to live inside "walled" cities. In the pursuit of discovering the secret behind these monsters and your world, you discover through a vision the history behind the forsaken truth of a war that has casted your people to live within these walls. You eventually discover a hostile world beyond your walls that believes your people to be offsprings of the devil. The vision further explains that everything that has happened to you, your entire family's death, your communities' devastation, and the millions who were killed are all necessary steps to a better future that would also eventually require your own sacrifice. The vision tells you a destiny of peace, harmony, and freedom, - a united world that's only possible if you become the villain that everyone can rally against, a common enemy who would have to kill billions, eventually turning your closest friends and comrades against you, and in the end be killed by the love of your life. Deviating from this fate leads to an unknown path and following it would assume the visions accomplishment.