Here, Humanity lives within the protective walls of Maria, Rose, and Sheena. Until one fateful day when Titans breached Wall Maria, thus killings thousands, and causing the rest of the people to escape into the inner walls. Food became scare, and living is hard. Now, humanity lives in fear of the titans that threaten to erase what's left of the human population. However, in order to regain peace, soldiers gather to fight the titans, in a desperate attempt to protect humanity and fight to live a happy life.