Sasha, who is good with bow and arrows had been hunting and living with her people, but is forced from her village because of the Titans’ attack. As a result of the attack, she becomes a new personnel and diligently trains every day. One night, an incident happens with the discovery of a suspicious-looking youth.
During the Great Titan War, a race of giants called Titans nearly wiped out humanity. The survivors built three concentric walls tall enough to keep the Titans out, but a century into that era of peace, the Colossal Titan suddenly appeared and kicked a hole through the Outer Wall, allowing other Titans to surge through. Forced to retreat behind the Middle Wall, humanity begins planning its retaliation.