Several Hundred Years Ago, Humans Were Nearly Exterminated By Giants. Giants Are Typically Several Stories Tall, Seem To Have No Intelligence And Who Devour Human Beings. A Small Percentage Of Humanity Survied Barricading Themselves In A City Protected By 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 - Before Teenager Elen And His Foster Sister Mikasa Witness Something Horrific As The City Walls Are Destroyed By A Super-Giant That Appears From Nowhere.