Attack on Titan follows several key characters through the events of the anime’s first season, including battles against the enormous, human-eating Titans. Humanity has sheltered behind towering walls for a century, until the Colossal Titan breaches the outer wall and lets the creatures overrun a city district.
Three young survivors eventually join the Scout Regiment. Among them is Eren Yeager, who loses his home and family in the attack and vows to destroy the Titans. With his friends, he ventures beyond the walls to fight them and investigate their origins.