Attack on Titan Season 1

in a world where humanity lives inside cities surrounded by enormous walls due to the Titans, gigantic humanoid beings who devour humans seemingly without reason. The story follows the adventures of Eren Yeager,[a] his adopted sister Mikasa Ackerman,[b] and their friend Armin Arlert,[c] whose lives are changed forever after a Colossal Titan breaches the wall of their home town. Vowing revenge and to reclaim the world from the Titans, Eren and his friends join the Scout Regiment,[1] an elite group of soldiers who fight Titans.